diff --git a/cases/attitude-imu-battery/README.md b/cases/attitude-imu-battery/README.md
deleted file mode 100644
index 65e6a9f..0000000
--- a/cases/attitude-imu-battery/README.md
+++ /dev/null
@@ -1,25 +0,0 @@
-# Attitude IMU - Battery
-
-Generated by the Feather Case Wizard.
-
-- Top profile: `generic`
-- FeatherWings: 1
-- Battery compartment: yes
-- 1/4-20 insert: yes
-- Approximate exterior: 93.9 × 57.3 × 35.8 mm
-- Formats: 3mf
-- Parts: `body`, `lid`
-- Custom cutouts: 0
-
-Run `ruby build.rb` in this directory to regenerate exports and previews.
-OpenSCAD and Blender must be installed. Set `OPENSCAD` or `BLENDER` to
-override their executable paths.
-
-To open the saved Customizer values manually:
-
-```bash
-openscad -p parameters.json -P attitude-imu-battery source/feather_case.scad
-```
-
-The 3MF files contain portable geometry only. Choose printer, filament,
-plate, and slicing settings in Bambu Studio.
diff --git a/cases/attitude-imu-battery/build.rb b/cases/attitude-imu-battery/build.rb
deleted file mode 100755
index 3deb8ab..0000000
--- a/cases/attitude-imu-battery/build.rb
+++ /dev/null
@@ -1,123 +0,0 @@
-#!/usr/bin/env ruby
-# frozen_string_literal: true
-
-require "fileutils"
-require "json"
-require "open3"
-require "pathname"
-require "tmpdir"
-require "yaml"
-
-ROOT = Pathname(__dir__).expand_path
-
-def executable(env_name, command)
-  override = ENV[env_name]
-  return File.expand_path(override) if override && File.executable?(override)
-
-  ENV.fetch("PATH", "").split(File::PATH_SEPARATOR).each do |directory|
-    candidate = File.join(directory, command)
-    return candidate if File.file?(candidate) && File.executable?(candidate)
-  end
-  nil
-end
-
-def literal(value)
-  case value
-  when String then JSON.generate(value)
-  when TrueClass then "true"
-  when FalseClass then "false"
-  when Numeric then value.to_s
-  when Array then "[#{value.map { |item| literal(item) }.join(",")}]"
-  else raise "Cannot convert #{value.inspect} to OpenSCAD"
-  end
-end
-
-def run!(*command, env: {})
-  stdout, stderr, status = Open3.capture3(env, *command)
-  return if status.success?
-
-  warn [stdout, stderr].reject(&:empty?).join("\n")
-  raise "Command failed (#{status.exitstatus}): #{command.first}"
-end
-
-config = YAML.safe_load_file(ROOT.join("case.yml"), permitted_classes: [],
-                             permitted_symbols: [], aliases: false)
-openscad = executable("OPENSCAD", "openscad")
-blender = executable("BLENDER", "blender")
-abort "OpenSCAD not found; install it or set OPENSCAD" unless openscad
-abort "Blender not found; install it or set BLENDER" unless blender
-
-parameters = config.fetch("parameters").merge(
-  "extra_cutouts" => config.fetch("resolved").fetch("extra_cutouts")
-)
-parts = %w[body lid] + config.fetch("outputs").fetch("coupons")
-buttons = %w[button_a button_b button_c button_reset]
-if parameters["top_profile"] == "oled128x64" &&
-   buttons.any? { |name| parameters[name] }
-  parts << "buttons"
-end
-
-stage = Pathname(Dir.mktmpdir(".rebuild-", ROOT.to_s))
-begin
-  exports = stage.join("exports")
-  previews = stage.join("previews")
-  scratch = stage.join("meshes")
-  FileUtils.mkdir_p([exports, previews, scratch])
-  model = ROOT.join("source/feather_case.scad")
-  renderer = ROOT.join("source/render_stl_previews.py")
-
-  export = lambda do |output, part, overrides = {}|
-    values = parameters.merge(overrides).merge("part" => part)
-    command = [openscad, "-o", output.to_s]
-    values.each { |name, value| command.concat(["-D", "#{name}=#{literal(value)}"]) }
-    run!(*command, model.to_s)
-  end
-
-  config.fetch("outputs").fetch("formats").each do |format|
-    directory = exports.join(format)
-    FileUtils.mkdir_p(directory)
-    parts.each do |part|
-      puts "Exporting #{part}.#{format}…"
-      export.call(directory.join("#{part}.#{format}"), part)
-    end
-  end
-
-  assembly = scratch.join("assembly.stl")
-  puts "Preparing assembly preview…"
-  export.call(assembly, "assembly",
-              "exploded_view" => config.fetch("outputs").fetch("assembly_exploded_view"),
-              "show_references" => false)
-  render_env = {"DISPLAY" => nil, "WAYLAND_DISPLAY" => nil}
-  run!(blender, "--background", "-noaudio", "--python", renderer.to_s, "--",
-       assembly.to_s, previews.to_s, "assembly", env: render_env)
-  parts.each do |part|
-    puts "Rendering #{part} preview…"
-    mesh = scratch.join("#{part}.stl")
-    export.call(mesh, part) unless mesh.file?
-    run!(blender, "--background", "-noaudio", "--python", renderer.to_s, "--",
-         mesh.to_s, previews.to_s, part, "iso", env: render_env)
-  end
-
-  backup = ROOT.join(".build-old-#{Process.pid}")
-  FileUtils.mkdir_p(backup)
-  %w[exports previews].each do |name|
-    current = ROOT.join(name)
-    FileUtils.mv(current, backup.join(name)) if current.exist?
-  end
-  begin
-    FileUtils.mv(exports, ROOT.join("exports"))
-    FileUtils.mv(previews, ROOT.join("previews"))
-    FileUtils.rm_rf(backup)
-  rescue StandardError
-    FileUtils.rm_rf(ROOT.join("exports"))
-    FileUtils.rm_rf(ROOT.join("previews"))
-    %w[exports previews].each do |name|
-      saved = backup.join(name)
-      FileUtils.mv(saved, ROOT.join(name)) if saved.exist?
-    end
-    raise
-  end
-  puts "Rebuilt #{ROOT}"
-ensure
-  FileUtils.rm_rf(stage)
-end
diff --git a/cases/attitude-imu-battery/case.yml b/cases/attitude-imu-battery/case.yml
deleted file mode 100644
index 2607b21..0000000
--- a/cases/attitude-imu-battery/case.yml
+++ /dev/null
@@ -1,82 +0,0 @@
----
-schema_version: 1
-name: Attitude IMU - Battery
-slug: attitude-imu-battery
-generator:
-  sha256: be611e3255e7d802719ebb0628e3d11481f8de05fc96c24d452f026d7b8e3353
-  created_with: feather-case-wizard
-parameters:
-  top_profile: generic
-  wing_count: 1
-  wing_pitch: 12.25
-  stack_height_override: 0.0
-  generic_component_height: 3.0
-  generic_top_gap: 2.0
-  gps_antenna_height: 6.0
-  gps_top_gap: 5.0
-  oled_component_height: 2.4
-  oled_display_height: 1.5
-  oled_face_gap: 0.8
-  button_a: true
-  button_b: true
-  button_c: true
-  button_reset: false
-  button_projection: 1.5
-  button_cap_size:
-  - 5.0
-  - 3.2
-  button_flange_size:
-  - 6.6
-  - 3.6
-  button_flange_thickness: 0.9
-  button_travel: 0.5
-  button_contact_extension: 0.7
-  battery_enabled: true
-  battery_length: 69.0
-  battery_diameter: 18.0
-  battery_radial_clearance: 0.6
-  battery_end_clearance: 1.0
-  switch_hole_diameter: 12.0
-  switch_hole_compensation: 0.3
-  switch_cap_diameter: 8.0
-  switch_flange_diameter: 16.2
-  switch_body_length: 24.0
-  switch_body_diameter: 12.0
-  switch_wire_allowance: 3.0
-  tripod_insert_enabled: true
-  tripod_insert_length: 6.4
-  tripod_insert_hole_diameter: 8.8
-  tripod_thread_clearance_diameter: 6.8
-  tripod_boss_diameter: 14.0
-  m25_insert_length: 4.0
-  m25_insert_hole_diameter: 3.7
-  m25_screw_clearance: 2.8
-  m25_boss_diameter: 7.0
-  insert_entry_chamfer: 0.6
-  insert_melt_relief: 0.8
-  wall_thickness: 2.4
-  floor_thickness: 2.4
-  lid_thickness: 3.2
-  corner_radius: 4.0
-  board_bottom_clearance: 5.4
-  board_side_clearance: 7.0
-  board_rear_clearance: 4.0
-  usb_board_wall_gap: 1.2
-  lid_lip_depth: 2.4
-  lid_lip_thickness: 1.2
-  fit_clearance: 0.35
-  hole_compensation: 0.2
-  lid_screw_head_diameter: 5.2
-  lid_screw_head_height: 2.5
-  usb_opening_width: 12.5
-  usb_opening_height: 7.0
-  usb_opening_radius: 1.5
-  usb_vertical_offset: 0.0
-cutouts: []
-outputs:
-  formats:
-  - 3mf
-  coupons: []
-  assembly_exploded_view: 8
-resolved:
-  extra_cutouts: []
diff --git a/cases/attitude-imu-battery/parameters.json b/cases/attitude-imu-battery/parameters.json
deleted file mode 100644
index 696327c..0000000
--- a/cases/attitude-imu-battery/parameters.json
+++ /dev/null
@@ -1,69 +0,0 @@
-{
-  "parameterSets": {
-    "attitude-imu-battery": {
-      "top_profile": "\"generic\"",
-      "wing_count": "1",
-      "wing_pitch": "12.25",
-      "stack_height_override": "0.0",
-      "generic_component_height": "3.0",
-      "generic_top_gap": "2.0",
-      "gps_antenna_height": "6.0",
-      "gps_top_gap": "5.0",
-      "oled_component_height": "2.4",
-      "oled_display_height": "1.5",
-      "oled_face_gap": "0.8",
-      "button_a": "true",
-      "button_b": "true",
-      "button_c": "true",
-      "button_reset": "false",
-      "button_projection": "1.5",
-      "button_cap_size": "[5.0,3.2]",
-      "button_flange_size": "[6.6,3.6]",
-      "button_flange_thickness": "0.9",
-      "button_travel": "0.5",
-      "button_contact_extension": "0.7",
-      "battery_enabled": "true",
-      "battery_length": "69.0",
-      "battery_diameter": "18.0",
-      "battery_radial_clearance": "0.6",
-      "battery_end_clearance": "1.0",
-      "switch_hole_diameter": "12.0",
-      "switch_hole_compensation": "0.3",
-      "switch_cap_diameter": "8.0",
-      "switch_flange_diameter": "16.2",
-      "switch_body_length": "24.0",
-      "switch_body_diameter": "12.0",
-      "switch_wire_allowance": "3.0",
-      "tripod_insert_enabled": "true",
-      "tripod_insert_length": "6.4",
-      "tripod_insert_hole_diameter": "8.8",
-      "tripod_thread_clearance_diameter": "6.8",
-      "tripod_boss_diameter": "14.0",
-      "m25_insert_length": "4.0",
-      "m25_insert_hole_diameter": "3.7",
-      "m25_screw_clearance": "2.8",
-      "m25_boss_diameter": "7.0",
-      "insert_entry_chamfer": "0.6",
-      "insert_melt_relief": "0.8",
-      "wall_thickness": "2.4",
-      "floor_thickness": "2.4",
-      "lid_thickness": "3.2",
-      "corner_radius": "4.0",
-      "board_bottom_clearance": "5.4",
-      "board_side_clearance": "7.0",
-      "board_rear_clearance": "4.0",
-      "usb_board_wall_gap": "1.2",
-      "lid_lip_depth": "2.4",
-      "lid_lip_thickness": "1.2",
-      "fit_clearance": "0.35",
-      "hole_compensation": "0.2",
-      "lid_screw_head_diameter": "5.2",
-      "lid_screw_head_height": "2.5",
-      "usb_opening_width": "12.5",
-      "usb_opening_height": "7.0",
-      "usb_opening_radius": "1.5",
-      "usb_vertical_offset": "0.0"
-    }
-  },
-  "fileFormatVersion": "1"
-}
diff --git a/cases/attitude-imu-battery/source/feather_case.scad b/cases/attitude-imu-battery/source/feather_case.scad
deleted file mode 100644
index 5a26c7b..0000000
--- a/cases/attitude-imu-battery/source/feather_case.scad
+++ /dev/null
@@ -1,872 +0,0 @@
-/*
- * Parametric enclosure for the Adafruit ESP32 Feather V2 and FeatherWings.
- *
- * Coordinate system:
- *   X: USB-C wall (0) toward the rear of the case
- *   Y: non-battery side (0) toward the battery/JST side
- *   Z: outside bottom (0) upward
- *
- * Board coordinates are derived from Adafruit's Eagle PCB files:
- *   https://github.com/adafruit/Adafruit-ESP32-Feather-V2-PCB
- *   https://github.com/adafruit/Adafruit-OLED-FeatherWing-PCB
- */
-
-/* [Output] */
-part = "assembly"; // [assembly,body,lid,buttons,insert_coupon,switch_coupon,fit_coupon]
-exploded_view = 8; // [0:1:20]
-show_references = true;
-
-/* [Stack] */
-top_profile = "generic"; // [generic,gps,oled128x64]
-wing_count = 1; // [1:1:8]
-wing_pitch = 12.25; // [7:0.1:16]
-stack_height_override = 0; // [0:0.1:100]
-generic_component_height = 3; // [0:0.1:30]
-generic_top_gap = 2; // [0.5:0.1:10]
-gps_antenna_height = 6;
-gps_top_gap = 5;
-oled_component_height = 2.4;
-oled_display_height = 1.5;
-oled_face_gap = 0.8;
-
-/* [OLED controls] */
-button_a = true;
-button_b = true;
-button_c = true;
-button_reset = false;
-button_projection = 1.5; // [0.5:0.1:3]
-button_cap_size = [5, 3.2];
-button_flange_size = [6.6, 3.6];
-button_flange_thickness = 0.9;
-button_travel = 0.5;
-button_contact_extension = 0.7;
-
-/* [Battery and switch] */
-battery_enabled = false;
-battery_length = 69;
-battery_diameter = 18;
-battery_radial_clearance = 0.6;
-battery_end_clearance = 1;
-switch_hole_diameter = 12;
-switch_hole_compensation = 0.3;
-switch_cap_diameter = 8;
-switch_flange_diameter = 16.2;
-switch_body_length = 24;
-switch_body_diameter = 12;
-switch_wire_allowance = 3;
-
-/* [Tripod mount] */
-tripod_insert_enabled = false;
-tripod_insert_length = 6.4;
-tripod_insert_hole_diameter = 8.8;
-tripod_thread_clearance_diameter = 6.8;
-tripod_boss_diameter = 14;
-
-/* [M2.5 inserts] */
-m25_insert_length = 4;
-m25_insert_hole_diameter = 3.7;
-m25_screw_clearance = 2.8;
-m25_boss_diameter = 7;
-insert_entry_chamfer = 0.6;
-insert_melt_relief = 0.8;
-
-/* [Shell and fit] */
-wall_thickness = 2.4;
-floor_thickness = 2.4;
-lid_thickness = 3.2;
-corner_radius = 4;
-board_bottom_clearance = 5.4;
-board_side_clearance = 7;
-board_rear_clearance = 4;
-usb_board_wall_gap = 1.2;
-lid_lip_depth = 2.4;
-lid_lip_thickness = 1.2;
-fit_clearance = 0.35;
-hole_compensation = 0.2;
-lid_screw_head_diameter = 5.2;
-lid_screw_head_height = 2.5;
-
-/* [USB-C opening] */
-usb_opening_width = 12.5;
-usb_opening_height = 7;
-usb_opening_radius = 1.5;
-usb_vertical_offset = 0;
-
-/* [Custom wall cutouts] */
-// Entry format: [face, shape, u, z, width, height, radius]
-// face: front, rear, left, right. u is Y on front/rear and X on left/right.
-// shape: circle, rect, roundrect, slot. Circle uses width as its diameter.
-extra_cutouts = [];
-
-/* [Calibration] */
-coupon_steps = [-0.3, -0.15, 0, 0.15, 0.3];
-
-$fn = $preview ? 36 : 72;
-eps = 0.02;
-
-// Adafruit Feather mechanical reference, millimetres.
-feather_length = 50.8;
-feather_width = 22.86;
-board_thickness = 1.6;
-mount_x = [2.54, 48.26];
-mount_y = [2.54, 20.32];
-usb_center_y = 11.43;
-
-// Official 128x64 OLED FeatherWing geometry in Feather-board coordinates.
-oled_visible_min = [11.42, 3.78];
-oled_visible_size = [30, 15.3];
-oled_button_a_xy = [4.318, 15.875];
-oled_button_b_xy = [4.318, 11.43];
-oled_button_c_xy = [4.318, 6.985];
-oled_button_reset_xy = [7.366, 20.828];
-
-effective_floor = tripod_insert_enabled
-    ? max(floor_thickness, tripod_insert_length + insert_melt_relief + 1.2)
-    : floor_thickness;
-effective_board_clearance = max(
-    board_bottom_clearance,
-    m25_insert_length + insert_melt_relief + 0.6
-);
-
-board_origin_x = wall_thickness + usb_board_wall_gap;
-board_origin_y = wall_thickness + board_side_clearance;
-board_bottom_z = effective_floor + effective_board_clearance;
-board_top_z = board_bottom_z + board_thickness;
-
-computed_top_pcb_z = board_top_z + wing_count * wing_pitch;
-top_pcb_z = stack_height_override > 0
-    ? board_top_z + stack_height_override
-    : computed_top_pcb_z;
-profile_component_height =
-    top_profile == "gps" ? gps_antenna_height :
-    top_profile == "oled128x64" ? oled_component_height :
-    generic_component_height;
-profile_top_gap =
-    top_profile == "gps" ? gps_top_gap :
-    top_profile == "oled128x64" ? oled_face_gap :
-    generic_top_gap;
-
-partition_y = board_origin_y + feather_width + 1;
-battery_center_y = partition_y + wall_thickness + battery_radial_clearance
-    + battery_diameter / 2;
-battery_start_x = board_origin_x + battery_end_clearance;
-battery_end_x = battery_start_x + battery_length;
-switch_center_x = battery_end_x + max(
-    switch_body_diameter / 2 + 0.8,
-    switch_flange_diameter / 2 + 0.5
-);
-
-case_length_plain = board_origin_x + feather_length
-    + board_rear_clearance + wall_thickness;
-case_length_battery = switch_center_x + switch_flange_diameter / 2
-    + 1.2 + wall_thickness;
-case_length = battery_enabled ? max(case_length_plain, case_length_battery)
-    : case_length_plain;
-
-case_width_plain = board_origin_y + feather_width
-    + board_side_clearance + wall_thickness;
-case_width_battery = battery_center_y + battery_diameter / 2
-    + battery_radial_clearance + wall_thickness;
-case_width = battery_enabled ? max(case_width_plain, case_width_battery)
-    : case_width_plain;
-
-battery_center_z = effective_floor + battery_radial_clearance
-    + battery_diameter / 2;
-switch_center_z = max(
-    effective_floor + switch_flange_diameter / 2 + 1,
-    battery_center_z
-);
-electronics_ceiling_z = top_pcb_z + profile_component_height + profile_top_gap;
-battery_ceiling_z = battery_enabled
-    ? max(
-        battery_center_z + battery_diameter / 2 + battery_radial_clearance,
-        switch_center_z + switch_flange_diameter / 2 + 1
-    )
-    : 0;
-body_height = max(electronics_ceiling_z, battery_ceiling_z);
-
-lid_boss_r = m25_boss_diameter / 2;
-lid_boss_wall_overlap = 0.6;
-lid_boss_xy = [
-    [
-        wall_thickness + lid_boss_r - lid_boss_wall_overlap,
-        wall_thickness + lid_boss_r - lid_boss_wall_overlap
-    ],
-    [
-        case_length - wall_thickness - lid_boss_r + lid_boss_wall_overlap,
-        wall_thickness + lid_boss_r - lid_boss_wall_overlap
-    ],
-    [
-        wall_thickness + lid_boss_r - lid_boss_wall_overlap,
-        case_width - wall_thickness - lid_boss_r + lid_boss_wall_overlap
-    ],
-    [
-        case_length - wall_thickness - lid_boss_r + lid_boss_wall_overlap,
-        case_width - wall_thickness - lid_boss_r + lid_boss_wall_overlap
-    ]
-];
-
-assert(wing_count >= 1, "wing_count must be at least one");
-assert(top_profile == "generic" || top_profile == "gps"
-    || top_profile == "oled128x64", "Unsupported top_profile");
-assert(wall_thickness >= 1.2, "wall_thickness is too small for 0.6 mm FDM");
-assert(lid_lip_thickness >= 1.2, "lid lip needs at least two 0.6 mm lines");
-assert(m25_boss_diameter > m25_insert_hole_diameter + 2,
-    "M2.5 boss does not have enough radial material");
-assert(!tripod_insert_enabled
-    || tripod_boss_diameter > tripod_insert_hole_diameter + 3,
-    "Tripod insert boss does not have enough radial material");
-
-function clamp(v, lo, hi) = min(max(v, lo), hi);
-
-module rounded_rect_2d(size, radius) {
-    r = clamp(radius, 0.01, min(size[0], size[1]) / 2 - 0.01);
-    hull() {
-        for (x = [r, size[0] - r], y = [r, size[1] - r])
-            translate([x, y]) circle(r = r);
-    }
-}
-
-module centered_rounded_rect_2d(size, radius) {
-    translate([-size[0] / 2, -size[1] / 2])
-        rounded_rect_2d(size, radius);
-}
-
-module centered_rounded_prism(size, height, radius) {
-    linear_extrude(height = height)
-        centered_rounded_rect_2d(size, radius);
-}
-
-module rounded_box(size, radius) {
-    linear_extrude(height = size[2])
-        rounded_rect_2d([size[0], size[1]], radius);
-}
-
-module insert_pocket(diameter, depth, entry_z, downward = true) {
-    bore_d = diameter + hole_compensation;
-    if (downward) {
-        translate([0, 0, entry_z - depth])
-            cylinder(h = depth + eps, d = bore_d);
-        translate([0, 0, entry_z - insert_entry_chamfer])
-            cylinder(
-                h = insert_entry_chamfer + eps,
-                d1 = bore_d,
-                d2 = bore_d + 2 * insert_entry_chamfer
-            );
-    } else {
-        translate([0, 0, entry_z - eps])
-            cylinder(h = depth + eps, d = bore_d);
-        translate([0, 0, entry_z - eps])
-            cylinder(
-                h = insert_entry_chamfer + eps,
-                d1 = bore_d + 2 * insert_entry_chamfer,
-                d2 = bore_d
-            );
-    }
-}
-
-module face_rounded_cutout(face, u, z, width, height, radius) {
-    r = clamp(radius, 0.01, min(width, height) / 2);
-    depth = wall_thickness + 2 * eps;
-    if (face == "front" || face == "rear") {
-        x0 = face == "front" ? -eps : case_length - wall_thickness - eps;
-        hull()
-            for (yy = [u - width / 2 + r, u + width / 2 - r],
-                 zz = [z - height / 2 + r, z + height / 2 - r])
-                translate([x0, yy, zz])
-                    rotate([0, 90, 0]) cylinder(h = depth, r = r);
-    } else if (face == "left" || face == "right") {
-        y0 = face == "left" ? -eps : case_width - wall_thickness - eps;
-        hull()
-            for (xx = [u - width / 2 + r, u + width / 2 - r],
-                 zz = [z - height / 2 + r, z + height / 2 - r])
-                translate([xx, y0, zz])
-                    rotate([-90, 0, 0]) cylinder(h = depth, r = r);
-    }
-}
-
-module face_circle_cutout(face, u, z, diameter) {
-    depth = wall_thickness + 2 * eps;
-    if (face == "front")
-        translate([-eps, u, z])
-            rotate([0, 90, 0]) cylinder(h = depth, d = diameter);
-    else if (face == "rear")
-        translate([case_length - wall_thickness - eps, u, z])
-            rotate([0, 90, 0]) cylinder(h = depth, d = diameter);
-    else if (face == "left")
-        translate([u, -eps, z])
-            rotate([-90, 0, 0]) cylinder(h = depth, d = diameter);
-    else if (face == "right")
-        translate([u, case_width - wall_thickness - eps, z])
-            rotate([-90, 0, 0]) cylinder(h = depth, d = diameter);
-}
-
-module custom_wall_cutout(entry) {
-    face = entry[0];
-    shape = entry[1];
-    u = entry[2];
-    z = entry[3];
-    width = entry[4];
-    height = len(entry) > 5 ? entry[5] : width;
-    radius = len(entry) > 6 ? entry[6] : min(width, height) / 2;
-    assert(face == "front" || face == "rear"
-        || face == "left" || face == "right", "Invalid cutout face");
-    assert(shape == "circle" || shape == "rect"
-        || shape == "roundrect" || shape == "slot", "Invalid cutout shape");
-    assert(z - height / 2 >= effective_floor,
-        "Cutout intersects the floor");
-    assert(z + height / 2 <= body_height - lid_lip_depth,
-        "Cutout intersects the lid locating lip");
-    assert(
-        (face == "front" || face == "rear")
-            ? u - width / 2 >= 0 && u + width / 2 <= case_width
-            : u - width / 2 >= 0 && u + width / 2 <= case_length,
-        "Cutout extends beyond its wall"
-    );
-
-    if (shape == "circle")
-        face_circle_cutout(face, u, z, width);
-    else
-        face_rounded_cutout(
-            face, u, z, width, height,
-            shape == "rect" ? 0.02 :
-            shape == "slot" ? min(width, height) / 2 : radius
-        );
-}
-
-module board_standoffs() {
-    for (mx = mount_x, my = mount_y)
-        translate([
-            board_origin_x + mx,
-            board_origin_y + my,
-            effective_floor - eps
-        ])
-            cylinder(
-                h = effective_board_clearance + eps,
-                d = m25_boss_diameter
-            );
-}
-
-module lid_bosses() {
-    for (p = lid_boss_xy)
-        translate([p[0], p[1], effective_floor - eps])
-            cylinder(
-                h = body_height - effective_floor + eps,
-                d = m25_boss_diameter
-            );
-}
-
-module battery_cradle() {
-    partition_height = min(
-        body_height - lid_lip_depth - 0.5,
-        battery_center_z + battery_diameter / 2 + 1.5
-    );
-    rib_width = 2.4;
-    rib_positions = [
-        battery_start_x + 4,
-        (battery_start_x + battery_end_x) / 2,
-        battery_end_x - 4
-    ];
-
-    // Board/battery partition, with a lead-routing notch near the JST end.
-    difference() {
-        translate([wall_thickness, partition_y, effective_floor - eps])
-            cube([
-                battery_end_x - wall_thickness + battery_end_clearance,
-                wall_thickness,
-                partition_height - effective_floor + eps
-            ]);
-        translate([
-            board_origin_x + 6.5,
-            partition_y - eps,
-            effective_floor + 1.5
-        ])
-            cube([9, wall_thickness + 2 * eps, 6]);
-    }
-
-    // Three low curved ribs cradle the protected cylindrical pack.
-    for (x = rib_positions)
-        difference() {
-            translate([
-                x - rib_width / 2,
-                battery_center_y - battery_diameter / 2
-                    - battery_radial_clearance,
-                effective_floor - eps
-            ])
-                cube([
-                    rib_width,
-                    battery_diameter + 2 * battery_radial_clearance,
-                    battery_diameter / 2 + battery_radial_clearance + eps
-                ]);
-            translate([x - rib_width, battery_center_y, battery_center_z])
-                rotate([0, 90, 0])
-                    cylinder(
-                        h = rib_width * 2,
-                        d = battery_diameter + 2 * battery_radial_clearance
-                    );
-        }
-
-    // End stops remain below the cell center so the lid can remove vertically.
-    for (x = [
-        battery_start_x - battery_end_clearance - wall_thickness,
-        battery_end_x + battery_end_clearance
-    ])
-        translate([
-            x,
-            battery_center_y - battery_diameter / 2 - battery_radial_clearance,
-            effective_floor - eps
-        ])
-            cube([
-                wall_thickness,
-                battery_diameter + 2 * battery_radial_clearance,
-                battery_diameter / 2 + 1 + eps
-            ]);
-
-    // Rear cross-strip separates the side-mounted switch body from the cell.
-    translate([
-        battery_end_x + battery_end_clearance,
-        partition_y,
-        effective_floor - eps
-    ])
-        cube([
-            case_length - wall_thickness - battery_end_x - battery_end_clearance,
-            case_width - wall_thickness - partition_y,
-            min(body_height - effective_floor, switch_center_z
-                + switch_body_diameter / 2 + switch_wire_allowance
-                - effective_floor) + eps
-        ]);
-}
-
-module body_positive() {
-    union() {
-        difference() {
-            rounded_box([case_length, case_width, body_height], corner_radius);
-            translate([wall_thickness, wall_thickness, effective_floor])
-                rounded_box([
-                    case_length - 2 * wall_thickness,
-                    case_width - 2 * wall_thickness,
-                    body_height - effective_floor + eps
-                ], max(0.6, corner_radius - wall_thickness));
-        }
-        board_standoffs();
-        lid_bosses();
-        if (battery_enabled)
-            battery_cradle();
-        if (tripod_insert_enabled)
-            translate([case_length / 2, case_width / 2, 0])
-                cylinder(h = effective_floor, d = tripod_boss_diameter);
-    }
-}
-
-module body_cutouts() {
-    // Board mounting insert pockets, loaded from above before the Feather.
-    for (mx = mount_x, my = mount_y)
-        translate([board_origin_x + mx, board_origin_y + my, 0])
-            insert_pocket(
-                m25_insert_hole_diameter,
-                m25_insert_length + insert_melt_relief,
-                board_bottom_z
-            );
-
-    // Lid insert pockets, loaded from the top of the body.
-    for (p = lid_boss_xy)
-        translate([p[0], p[1], 0])
-            insert_pocket(
-                m25_insert_hole_diameter,
-                m25_insert_length + insert_melt_relief,
-                body_height
-            );
-
-    // USB-C cable opening. Connector center is from the official ESP32 V2 PCB.
-    usb_center_z = board_top_z + 1.6 + usb_vertical_offset;
-    face_rounded_cutout(
-        "front",
-        board_origin_y + usb_center_y,
-        usb_center_z,
-        usb_opening_width + hole_compensation,
-        usb_opening_height + hole_compensation,
-        usb_opening_radius
-    );
-
-    if (battery_enabled) {
-        face_circle_cutout(
-            "right",
-            switch_center_x,
-            switch_center_z,
-            switch_hole_diameter + switch_hole_compensation
-        );
-        // Clear the switch body and its prewired terminals through the rear bay.
-        translate([
-            switch_center_x,
-            case_width - wall_thickness + eps,
-            switch_center_z
-        ])
-            rotate([90, 0, 0])
-                cylinder(
-                    h = switch_body_length + switch_wire_allowance
-                        + wall_thickness + eps,
-                    d = switch_body_diameter + 2 * fit_clearance
-                );
-    }
-
-    if (tripod_insert_enabled) {
-        translate([case_length / 2, case_width / 2, 0]) {
-            translate([0, 0, -eps])
-                cylinder(
-                    h = effective_floor + 2 * eps,
-                    d = tripod_thread_clearance_diameter + hole_compensation
-                );
-            insert_pocket(
-                tripod_insert_hole_diameter,
-                tripod_insert_length + insert_melt_relief,
-                effective_floor
-            );
-        }
-    }
-
-    for (entry = extra_cutouts)
-        custom_wall_cutout(entry);
-}
-
-module body() {
-    difference() {
-        body_positive();
-        body_cutouts();
-    }
-}
-
-module lid_plate_positive() {
-    union() {
-        rounded_box([case_length, case_width, lid_thickness], corner_radius);
-        // Inset rim: exported pointing upward so the outer lid face prints flat.
-        translate([
-            wall_thickness + fit_clearance,
-            wall_thickness + fit_clearance,
-            lid_thickness
-        ])
-            linear_extrude(height = lid_lip_depth)
-                difference() {
-                    rounded_rect_2d([
-                        case_length - 2 * (wall_thickness + fit_clearance),
-                        case_width - 2 * (wall_thickness + fit_clearance)
-                    ], max(0.6, corner_radius - wall_thickness));
-                    translate([lid_lip_thickness, lid_lip_thickness])
-                        rounded_rect_2d([
-                            case_length - 2 * (
-                                wall_thickness + fit_clearance
-                                + lid_lip_thickness
-                            ),
-                            case_width - 2 * (
-                                wall_thickness + fit_clearance
-                                + lid_lip_thickness
-                            )
-                        ], max(0.5, corner_radius - wall_thickness
-                            - lid_lip_thickness));
-                }
-    }
-}
-
-module beveled_oled_window() {
-    inner_size = oled_visible_size;
-    outer_size = [oled_visible_size[0] + 3, oled_visible_size[1] + 3];
-    center = [
-        board_origin_x + oled_visible_min[0] + oled_visible_size[0] / 2,
-        board_origin_y + oled_visible_min[1] + oled_visible_size[1] / 2
-    ];
-    hull() {
-        translate([center[0], center[1], -eps])
-            linear_extrude(height = eps)
-                centered_rounded_rect_2d(outer_size, 1.5);
-        translate([center[0], center[1], lid_thickness - eps])
-            linear_extrude(height = 2 * eps)
-                centered_rounded_rect_2d(inner_size, 0.8);
-    }
-}
-
-module oled_button_lid_cutout(xy) {
-    center = [board_origin_x + xy[0], board_origin_y + xy[1]];
-    shaft_size = [
-        button_cap_size[0] + fit_clearance * 2,
-        button_cap_size[1] + fit_clearance * 2
-    ];
-    recess_size = [
-        button_flange_size[0] + fit_clearance * 2,
-        button_flange_size[1] + fit_clearance * 2
-    ];
-    recess_depth = button_flange_thickness + button_travel;
-    translate([center[0], center[1], -eps])
-        centered_rounded_prism(
-            shaft_size,
-            lid_thickness + 2 * eps,
-            shaft_size[1] / 2
-        );
-    translate([center[0], center[1], lid_thickness - recess_depth])
-        centered_rounded_prism(
-            recess_size,
-            recess_depth + lid_lip_depth + eps,
-            recess_size[1] / 2
-        );
-}
-
-module lid_cutouts() {
-    // Through holes plus shallow counterbores for flush M2.5 socket heads.
-    for (p = lid_boss_xy) {
-        translate([p[0], p[1], -eps])
-            cylinder(
-                h = lid_thickness + lid_lip_depth + 2 * eps,
-                d = m25_screw_clearance + hole_compensation
-            );
-        translate([p[0], p[1], -eps])
-            cylinder(
-                h = lid_screw_head_height + eps,
-                d = lid_screw_head_diameter + hole_compensation
-            );
-    }
-
-    if (top_profile == "oled128x64") {
-        beveled_oled_window();
-        if (button_a) oled_button_lid_cutout(oled_button_a_xy);
-        if (button_b) oled_button_lid_cutout(oled_button_b_xy);
-        if (button_c) oled_button_lid_cutout(oled_button_c_xy);
-        if (button_reset) oled_button_lid_cutout(oled_button_reset_xy);
-    }
-}
-
-module lid() {
-    difference() {
-        lid_plate_positive();
-        lid_cutouts();
-    }
-}
-
-module one_oled_button() {
-    recess_depth = button_flange_thickness + button_travel;
-    stem_height = lid_thickness - recess_depth + button_projection;
-    // Print outer cap face down. The flange and contact nub build upward.
-    centered_rounded_prism(
-        button_cap_size,
-        stem_height,
-        button_cap_size[1] / 2
-    );
-    translate([0, 0, stem_height])
-        centered_rounded_prism(
-            button_flange_size,
-            button_flange_thickness,
-            button_flange_size[1] / 2
-        );
-    translate([0, 0, stem_height + button_flange_thickness])
-        cylinder(h = button_contact_extension, d = 3);
-}
-
-module buttons() {
-    enabled = [
-        button_a,
-        button_b,
-        button_c,
-        button_reset
-    ];
-    count_enabled = len([for (v = enabled) if (v) 1]);
-    if (count_enabled == 0)
-        echo("No OLED buttons are enabled.");
-    for (i = [0 : len(enabled) - 1])
-        if (enabled[i])
-            translate([i * (button_flange_size[0] + 3), 0, 0])
-                one_oled_button();
-}
-
-module reference_board() {
-    color([0.05, 0.25, 0.55, 0.75])
-        translate([board_origin_x, board_origin_y, board_bottom_z])
-            rounded_box([feather_length, feather_width, board_thickness], 2.54);
-    color([0.12, 0.45, 0.75, 0.45])
-        for (i = [1 : wing_count])
-            translate([
-                board_origin_x,
-                board_origin_y,
-                board_top_z + i * wing_pitch - board_thickness
-            ])
-                rounded_box(
-                    [feather_length, feather_width, board_thickness], 2.54
-                );
-}
-
-module reference_top_feature() {
-    if (top_profile == "gps")
-        color([0.92, 0.78, 0.35, 0.8])
-            translate([
-                board_origin_x + 31,
-                board_origin_y + (feather_width - 15) / 2,
-                top_pcb_z
-            ])
-                cube([15, 15, gps_antenna_height]);
-    else if (top_profile == "oled128x64") {
-        color([0.12, 0.12, 0.12, 0.9])
-            translate([
-                board_origin_x + oled_visible_min[0],
-                board_origin_y + oled_visible_min[1],
-                top_pcb_z
-            ])
-                cube([
-                    oled_visible_size[0],
-                    oled_visible_size[1],
-                    oled_display_height
-                ]);
-        color([0.6, 0.6, 0.6, 0.9])
-            for (xy = [
-                oled_button_a_xy,
-                oled_button_b_xy,
-                oled_button_c_xy,
-                oled_button_reset_xy
-            ])
-                translate([
-                    board_origin_x + xy[0],
-                    board_origin_y + xy[1],
-                    top_pcb_z
-                ])
-                    cylinder(h = 1.6, d = 2.1);
-    } else
-        color([0.3, 0.65, 0.35, 0.6])
-            translate([
-                board_origin_x + 10,
-                board_origin_y + 4,
-                top_pcb_z
-            ])
-                cube([
-                    feather_length - 20,
-                    feather_width - 8,
-                    generic_component_height
-                ]);
-}
-
-module reference_battery_and_switch() {
-    if (battery_enabled) {
-        color([0.35, 0.18, 0.55, 0.75])
-            translate([battery_start_x, battery_center_y, battery_center_z])
-                rotate([0, 90, 0])
-                    cylinder(h = battery_length, d = battery_diameter);
-        color([0.8, 0.15, 0.1, 0.65])
-            translate([
-                switch_center_x,
-                case_width - wall_thickness,
-                switch_center_z
-            ])
-                rotate([90, 0, 0]) {
-                    cylinder(h = switch_body_length, d = switch_body_diameter);
-                    translate([0, 0, -1.5])
-                        cylinder(h = 1.5, d = switch_flange_diameter);
-                    translate([0, 0, -3])
-                        cylinder(h = 3, d = switch_cap_diameter);
-                }
-    }
-}
-
-module assembly() {
-    color([0.82, 0.84, 0.88, 1]) body();
-    if ($preview && show_references) {
-        reference_board();
-        reference_top_feature();
-        reference_battery_and_switch();
-    }
-    // Printable lid is mirrored into its installed orientation and exploded up.
-    color([0.92, 0.92, 0.95, 0.88])
-        translate([0, case_width, body_height + lid_thickness + exploded_view])
-            rotate([180, 0, 0])
-                lid();
-}
-
-module coupon_hole(x, y, diameter, depth) {
-    translate([x, y, -eps]) cylinder(h = depth + 2 * eps, d = diameter);
-}
-
-module insert_coupon() {
-    spacing = 15;
-    coupon_length = spacing * len(coupon_steps) + 8;
-    coupon_width = 32;
-    coupon_height = max(
-        m25_insert_length + insert_melt_relief + 1.2,
-        tripod_insert_length + insert_melt_relief + 1.2
-    );
-    difference() {
-        rounded_box([coupon_length, coupon_width, coupon_height], 3);
-        for (i = [0 : len(coupon_steps) - 1]) {
-            x = 7 + i * spacing;
-            coupon_hole(
-                x, 8,
-                m25_insert_hole_diameter + coupon_steps[i],
-                m25_insert_length + insert_melt_relief
-            );
-            coupon_hole(
-                x, 23,
-                tripod_insert_hole_diameter + coupon_steps[i],
-                tripod_insert_length + insert_melt_relief
-            );
-        }
-    }
-}
-
-module switch_coupon() {
-    spacing = 18;
-    coupon_length = spacing * len(coupon_steps) + 6;
-    coupon_width = 24;
-    coupon_height = wall_thickness;
-    difference() {
-        rounded_box([coupon_length, coupon_width, coupon_height], 3);
-        for (i = [0 : len(coupon_steps) - 1])
-            translate([6 + i * spacing, coupon_width / 2, -eps])
-                cylinder(
-                    h = coupon_height + 2 * eps,
-                    d = switch_hole_diameter + coupon_steps[i]
-                );
-    }
-}
-
-module fit_coupon() {
-    segment_length = 34;
-    base_width = 16;
-    base_height = 6;
-    cavity_size = [segment_length - 8, base_width - 8];
-    male_size = [
-        cavity_size[0] - 2 * fit_clearance,
-        cavity_size[1] - 2 * fit_clearance
-    ];
-    difference() {
-        rounded_box([segment_length, base_width, base_height], 2);
-        translate([4, 4, 2])
-            cube([segment_length - 8, base_width - 8, base_height]);
-    }
-    translate([segment_length + 5, 0, 0])
-        union() {
-            cube([segment_length, base_width, lid_thickness]);
-            translate([
-                4 + fit_clearance,
-                4 + fit_clearance,
-                lid_thickness - eps
-            ])
-                linear_extrude(height = lid_lip_depth + eps)
-                    difference() {
-                        rounded_rect_2d(male_size, 1);
-                        translate([lid_lip_thickness, lid_lip_thickness])
-                            rounded_rect_2d([
-                                male_size[0] - 2 * lid_lip_thickness,
-                                male_size[1] - 2 * lid_lip_thickness
-                            ], 0.5);
-                    }
-        }
-}
-
-if (part == "assembly")
-    assembly();
-else if (part == "body")
-    body();
-else if (part == "lid")
-    lid();
-else if (part == "buttons")
-    buttons();
-else if (part == "insert_coupon")
-    insert_coupon();
-else if (part == "switch_coupon")
-    switch_coupon();
-else if (part == "fit_coupon")
-    fit_coupon();
-else
-    assert(false, str("Unknown part: ", part));
diff --git a/cases/attitude-imu-battery/source/render_stl_previews.py b/cases/attitude-imu-battery/source/render_stl_previews.py
deleted file mode 100644
index c8675ac..0000000
--- a/cases/attitude-imu-battery/source/render_stl_previews.py
+++ /dev/null
@@ -1,127 +0,0 @@
-"""Render six inspection views of an STL using Blender.
-
-Usage:
-    blender --background --python tools/render_stl_previews.py -- \
-        input.stl output-directory basename [comma-separated-views]
-"""
-
-import os
-import sys
-
-import bpy
-from mathutils import Vector
-
-
-def arguments():
-    args = sys.argv[sys.argv.index("--") + 1 :]
-    if len(args) not in (3, 4):
-        raise SystemExit(
-            "expected: input.stl output-directory basename [comma-separated-views]"
-        )
-    requested_views = args[3].split(",") if len(args) == 4 else None
-    return args[0], args[1], args[2], requested_views
-
-
-def look_at(camera, target):
-    direction = Vector(target) - camera.location
-    camera.rotation_euler = direction.to_track_quat("-Z", "Y").to_euler()
-
-
-def render_view(camera, center, span, name, direction, output_dir, basename):
-    distance = span * 2.2
-    camera.location = Vector(center) + Vector(direction).normalized() * distance
-    look_at(camera, center)
-    camera.data.type = "ORTHO"
-    camera.data.ortho_scale = span * 1.35
-    bpy.context.scene.render.filepath = os.path.join(
-        output_dir, f"{basename}_{name}.png"
-    )
-    bpy.ops.render.render(write_still=True)
-
-
-def main():
-    input_path, output_dir, basename, requested_views = arguments()
-    os.makedirs(output_dir, exist_ok=True)
-
-    bpy.ops.wm.read_factory_settings(use_empty=True)
-    bpy.ops.wm.stl_import(filepath=os.path.abspath(input_path))
-    model = bpy.context.selected_objects[0]
-    model.name = "Feather case"
-
-    material = bpy.data.materials.new("Case material")
-    material.diffuse_color = (0.16, 0.42, 0.72, 1.0)
-    material.metallic = 0.0
-    material.roughness = 0.45
-    model.data.materials.append(material)
-
-    corners = [model.matrix_world @ Vector(corner) for corner in model.bound_box]
-    mins = Vector([min(v[i] for v in corners) for i in range(3)])
-    maxs = Vector([max(v[i] for v in corners) for i in range(3)])
-    center = (mins + maxs) / 2
-    span = max(maxs - mins)
-
-    world = bpy.data.worlds.new("Inspection world")
-    world.use_nodes = True
-    world.node_tree.nodes["Background"].inputs["Color"].default_value = (
-        0.035,
-        0.04,
-        0.05,
-        1,
-    )
-    world.node_tree.nodes["Background"].inputs["Strength"].default_value = 0.5
-    bpy.context.scene.world = world
-
-    camera_data = bpy.data.cameras.new("Camera")
-    camera = bpy.data.objects.new("Camera", camera_data)
-    bpy.context.collection.objects.link(camera)
-    bpy.context.scene.camera = camera
-
-    key_data = bpy.data.lights.new("Key", type="AREA")
-    key_data.energy = 900
-    key_data.shape = "DISK"
-    key_data.size = span
-    key = bpy.data.objects.new("Key", key_data)
-    key.location = center + Vector((span, -span, span * 1.5))
-    bpy.context.collection.objects.link(key)
-
-    fill_data = bpy.data.lights.new("Fill", type="AREA")
-    fill_data.energy = 500
-    fill_data.size = span
-    fill = bpy.data.objects.new("Fill", fill_data)
-    fill.location = center + Vector((-span, span, span))
-    bpy.context.collection.objects.link(fill)
-
-    scene = bpy.context.scene
-    scene.render.engine = "BLENDER_WORKBENCH"
-    scene.render.resolution_x = 800
-    scene.render.resolution_y = 600
-    scene.render.resolution_percentage = 100
-    scene.render.image_settings.file_format = "PNG"
-    scene.render.film_transparent = False
-    scene.display.shading.light = "STUDIO"
-    scene.display.shading.color_type = "MATERIAL"
-    scene.display.shading.show_shadows = True
-    scene.display.shading.show_cavity = True
-    scene.display.shading.cavity_type = "BOTH"
-    scene.display.shading.curvature_ridge_factor = 1.5
-    scene.display.shading.curvature_valley_factor = 1.2
-
-    views = {
-        "iso": (1, -1, 0.8),
-        "front": (-1, 0, 0),
-        "back": (1, 0, 0),
-        "left": (0, -1, 0),
-        "right": (0, 1, 0),
-        "top": (0, 0, 1),
-    }
-    selected = requested_views or list(views)
-    unknown = sorted(set(selected) - set(views))
-    if unknown:
-        raise SystemExit(f"unknown views: {', '.join(unknown)}")
-    for name in selected:
-        direction = views[name]
-        render_view(camera, center, span, name, direction, output_dir, basename)
-
-
-if __name__ == "__main__":
-    main()
diff --git a/cases/attitude-imu/README.md b/cases/attitude-imu/README.md
deleted file mode 100644
index 27c8bce..0000000
--- a/cases/attitude-imu/README.md
+++ /dev/null
@@ -1,25 +0,0 @@
-# Attitude IMU
-
-Generated by the Feather Case Wizard.
-
-- Top profile: `generic`
-- FeatherWings: 1
-- Battery compartment: no
-- 1/4-20 insert: yes
-- Approximate exterior: 60.8 × 41.7 × 35.8 mm
-- Formats: 3mf
-- Parts: `body`, `lid`
-- Custom cutouts: 0
-
-Run `ruby build.rb` in this directory to regenerate exports and previews.
-OpenSCAD and Blender must be installed. Set `OPENSCAD` or `BLENDER` to
-override their executable paths.
-
-To open the saved Customizer values manually:
-
-```bash
-openscad -p parameters.json -P attitude-imu source/feather_case.scad
-```
-
-The 3MF files contain portable geometry only. Choose printer, filament,
-plate, and slicing settings in Bambu Studio.
diff --git a/cases/attitude-imu/build.rb b/cases/attitude-imu/build.rb
deleted file mode 100755
index 3deb8ab..0000000
--- a/cases/attitude-imu/build.rb
+++ /dev/null
@@ -1,123 +0,0 @@
-#!/usr/bin/env ruby
-# frozen_string_literal: true
-
-require "fileutils"
-require "json"
-require "open3"
-require "pathname"
-require "tmpdir"
-require "yaml"
-
-ROOT = Pathname(__dir__).expand_path
-
-def executable(env_name, command)
-  override = ENV[env_name]
-  return File.expand_path(override) if override && File.executable?(override)
-
-  ENV.fetch("PATH", "").split(File::PATH_SEPARATOR).each do |directory|
-    candidate = File.join(directory, command)
-    return candidate if File.file?(candidate) && File.executable?(candidate)
-  end
-  nil
-end
-
-def literal(value)
-  case value
-  when String then JSON.generate(value)
-  when TrueClass then "true"
-  when FalseClass then "false"
-  when Numeric then value.to_s
-  when Array then "[#{value.map { |item| literal(item) }.join(",")}]"
-  else raise "Cannot convert #{value.inspect} to OpenSCAD"
-  end
-end
-
-def run!(*command, env: {})
-  stdout, stderr, status = Open3.capture3(env, *command)
-  return if status.success?
-
-  warn [stdout, stderr].reject(&:empty?).join("\n")
-  raise "Command failed (#{status.exitstatus}): #{command.first}"
-end
-
-config = YAML.safe_load_file(ROOT.join("case.yml"), permitted_classes: [],
-                             permitted_symbols: [], aliases: false)
-openscad = executable("OPENSCAD", "openscad")
-blender = executable("BLENDER", "blender")
-abort "OpenSCAD not found; install it or set OPENSCAD" unless openscad
-abort "Blender not found; install it or set BLENDER" unless blender
-
-parameters = config.fetch("parameters").merge(
-  "extra_cutouts" => config.fetch("resolved").fetch("extra_cutouts")
-)
-parts = %w[body lid] + config.fetch("outputs").fetch("coupons")
-buttons = %w[button_a button_b button_c button_reset]
-if parameters["top_profile"] == "oled128x64" &&
-   buttons.any? { |name| parameters[name] }
-  parts << "buttons"
-end
-
-stage = Pathname(Dir.mktmpdir(".rebuild-", ROOT.to_s))
-begin
-  exports = stage.join("exports")
-  previews = stage.join("previews")
-  scratch = stage.join("meshes")
-  FileUtils.mkdir_p([exports, previews, scratch])
-  model = ROOT.join("source/feather_case.scad")
-  renderer = ROOT.join("source/render_stl_previews.py")
-
-  export = lambda do |output, part, overrides = {}|
-    values = parameters.merge(overrides).merge("part" => part)
-    command = [openscad, "-o", output.to_s]
-    values.each { |name, value| command.concat(["-D", "#{name}=#{literal(value)}"]) }
-    run!(*command, model.to_s)
-  end
-
-  config.fetch("outputs").fetch("formats").each do |format|
-    directory = exports.join(format)
-    FileUtils.mkdir_p(directory)
-    parts.each do |part|
-      puts "Exporting #{part}.#{format}…"
-      export.call(directory.join("#{part}.#{format}"), part)
-    end
-  end
-
-  assembly = scratch.join("assembly.stl")
-  puts "Preparing assembly preview…"
-  export.call(assembly, "assembly",
-              "exploded_view" => config.fetch("outputs").fetch("assembly_exploded_view"),
-              "show_references" => false)
-  render_env = {"DISPLAY" => nil, "WAYLAND_DISPLAY" => nil}
-  run!(blender, "--background", "-noaudio", "--python", renderer.to_s, "--",
-       assembly.to_s, previews.to_s, "assembly", env: render_env)
-  parts.each do |part|
-    puts "Rendering #{part} preview…"
-    mesh = scratch.join("#{part}.stl")
-    export.call(mesh, part) unless mesh.file?
-    run!(blender, "--background", "-noaudio", "--python", renderer.to_s, "--",
-         mesh.to_s, previews.to_s, part, "iso", env: render_env)
-  end
-
-  backup = ROOT.join(".build-old-#{Process.pid}")
-  FileUtils.mkdir_p(backup)
-  %w[exports previews].each do |name|
-    current = ROOT.join(name)
-    FileUtils.mv(current, backup.join(name)) if current.exist?
-  end
-  begin
-    FileUtils.mv(exports, ROOT.join("exports"))
-    FileUtils.mv(previews, ROOT.join("previews"))
-    FileUtils.rm_rf(backup)
-  rescue StandardError
-    FileUtils.rm_rf(ROOT.join("exports"))
-    FileUtils.rm_rf(ROOT.join("previews"))
-    %w[exports previews].each do |name|
-      saved = backup.join(name)
-      FileUtils.mv(saved, ROOT.join(name)) if saved.exist?
-    end
-    raise
-  end
-  puts "Rebuilt #{ROOT}"
-ensure
-  FileUtils.rm_rf(stage)
-end
diff --git a/cases/attitude-imu/case.yml b/cases/attitude-imu/case.yml
deleted file mode 100644
index 6a63849..0000000
--- a/cases/attitude-imu/case.yml
+++ /dev/null
@@ -1,82 +0,0 @@
----
-schema_version: 1
-name: Attitude IMU
-slug: attitude-imu
-generator:
-  sha256: be611e3255e7d802719ebb0628e3d11481f8de05fc96c24d452f026d7b8e3353
-  created_with: feather-case-wizard
-parameters:
-  top_profile: generic
-  wing_count: 1
-  wing_pitch: 12.25
-  stack_height_override: 0.0
-  generic_component_height: 3.0
-  generic_top_gap: 2.0
-  gps_antenna_height: 6.0
-  gps_top_gap: 5.0
-  oled_component_height: 2.4
-  oled_display_height: 1.5
-  oled_face_gap: 0.8
-  button_a: true
-  button_b: true
-  button_c: true
-  button_reset: false
-  button_projection: 1.5
-  button_cap_size:
-  - 5.0
-  - 3.2
-  button_flange_size:
-  - 6.6
-  - 3.6
-  button_flange_thickness: 0.9
-  button_travel: 0.5
-  button_contact_extension: 0.7
-  battery_enabled: false
-  battery_length: 69.0
-  battery_diameter: 18.0
-  battery_radial_clearance: 0.6
-  battery_end_clearance: 1.0
-  switch_hole_diameter: 12.0
-  switch_hole_compensation: 0.3
-  switch_cap_diameter: 8.0
-  switch_flange_diameter: 16.2
-  switch_body_length: 24.0
-  switch_body_diameter: 12.0
-  switch_wire_allowance: 3.0
-  tripod_insert_enabled: true
-  tripod_insert_length: 6.4
-  tripod_insert_hole_diameter: 8.8
-  tripod_thread_clearance_diameter: 6.8
-  tripod_boss_diameter: 14.0
-  m25_insert_length: 4.0
-  m25_insert_hole_diameter: 3.7
-  m25_screw_clearance: 2.8
-  m25_boss_diameter: 7.0
-  insert_entry_chamfer: 0.6
-  insert_melt_relief: 0.8
-  wall_thickness: 2.4
-  floor_thickness: 2.4
-  lid_thickness: 3.2
-  corner_radius: 4.0
-  board_bottom_clearance: 5.4
-  board_side_clearance: 7.0
-  board_rear_clearance: 4.0
-  usb_board_wall_gap: 1.2
-  lid_lip_depth: 2.4
-  lid_lip_thickness: 1.2
-  fit_clearance: 0.35
-  hole_compensation: 0.2
-  lid_screw_head_diameter: 5.2
-  lid_screw_head_height: 2.5
-  usb_opening_width: 12.5
-  usb_opening_height: 7.0
-  usb_opening_radius: 1.5
-  usb_vertical_offset: 0.0
-cutouts: []
-outputs:
-  formats:
-  - 3mf
-  coupons: []
-  assembly_exploded_view: 8
-resolved:
-  extra_cutouts: []
diff --git a/cases/attitude-imu/parameters.json b/cases/attitude-imu/parameters.json
deleted file mode 100644
index 32b6f11..0000000
--- a/cases/attitude-imu/parameters.json
+++ /dev/null
@@ -1,69 +0,0 @@
-{
-  "parameterSets": {
-    "attitude-imu": {
-      "top_profile": "\"generic\"",
-      "wing_count": "1",
-      "wing_pitch": "12.25",
-      "stack_height_override": "0.0",
-      "generic_component_height": "3.0",
-      "generic_top_gap": "2.0",
-      "gps_antenna_height": "6.0",
-      "gps_top_gap": "5.0",
-      "oled_component_height": "2.4",
-      "oled_display_height": "1.5",
-      "oled_face_gap": "0.8",
-      "button_a": "true",
-      "button_b": "true",
-      "button_c": "true",
-      "button_reset": "false",
-      "button_projection": "1.5",
-      "button_cap_size": "[5.0,3.2]",
-      "button_flange_size": "[6.6,3.6]",
-      "button_flange_thickness": "0.9",
-      "button_travel": "0.5",
-      "button_contact_extension": "0.7",
-      "battery_enabled": "false",
-      "battery_length": "69.0",
-      "battery_diameter": "18.0",
-      "battery_radial_clearance": "0.6",
-      "battery_end_clearance": "1.0",
-      "switch_hole_diameter": "12.0",
-      "switch_hole_compensation": "0.3",
-      "switch_cap_diameter": "8.0",
-      "switch_flange_diameter": "16.2",
-      "switch_body_length": "24.0",
-      "switch_body_diameter": "12.0",
-      "switch_wire_allowance": "3.0",
-      "tripod_insert_enabled": "true",
-      "tripod_insert_length": "6.4",
-      "tripod_insert_hole_diameter": "8.8",
-      "tripod_thread_clearance_diameter": "6.8",
-      "tripod_boss_diameter": "14.0",
-      "m25_insert_length": "4.0",
-      "m25_insert_hole_diameter": "3.7",
-      "m25_screw_clearance": "2.8",
-      "m25_boss_diameter": "7.0",
-      "insert_entry_chamfer": "0.6",
-      "insert_melt_relief": "0.8",
-      "wall_thickness": "2.4",
-      "floor_thickness": "2.4",
-      "lid_thickness": "3.2",
-      "corner_radius": "4.0",
-      "board_bottom_clearance": "5.4",
-      "board_side_clearance": "7.0",
-      "board_rear_clearance": "4.0",
-      "usb_board_wall_gap": "1.2",
-      "lid_lip_depth": "2.4",
-      "lid_lip_thickness": "1.2",
-      "fit_clearance": "0.35",
-      "hole_compensation": "0.2",
-      "lid_screw_head_diameter": "5.2",
-      "lid_screw_head_height": "2.5",
-      "usb_opening_width": "12.5",
-      "usb_opening_height": "7.0",
-      "usb_opening_radius": "1.5",
-      "usb_vertical_offset": "0.0"
-    }
-  },
-  "fileFormatVersion": "1"
-}
diff --git a/cases/attitude-imu/source/feather_case.scad b/cases/attitude-imu/source/feather_case.scad
deleted file mode 100644
index 5a26c7b..0000000
--- a/cases/attitude-imu/source/feather_case.scad
+++ /dev/null
@@ -1,872 +0,0 @@
-/*
- * Parametric enclosure for the Adafruit ESP32 Feather V2 and FeatherWings.
- *
- * Coordinate system:
- *   X: USB-C wall (0) toward the rear of the case
- *   Y: non-battery side (0) toward the battery/JST side
- *   Z: outside bottom (0) upward
- *
- * Board coordinates are derived from Adafruit's Eagle PCB files:
- *   https://github.com/adafruit/Adafruit-ESP32-Feather-V2-PCB
- *   https://github.com/adafruit/Adafruit-OLED-FeatherWing-PCB
- */
-
-/* [Output] */
-part = "assembly"; // [assembly,body,lid,buttons,insert_coupon,switch_coupon,fit_coupon]
-exploded_view = 8; // [0:1:20]
-show_references = true;
-
-/* [Stack] */
-top_profile = "generic"; // [generic,gps,oled128x64]
-wing_count = 1; // [1:1:8]
-wing_pitch = 12.25; // [7:0.1:16]
-stack_height_override = 0; // [0:0.1:100]
-generic_component_height = 3; // [0:0.1:30]
-generic_top_gap = 2; // [0.5:0.1:10]
-gps_antenna_height = 6;
-gps_top_gap = 5;
-oled_component_height = 2.4;
-oled_display_height = 1.5;
-oled_face_gap = 0.8;
-
-/* [OLED controls] */
-button_a = true;
-button_b = true;
-button_c = true;
-button_reset = false;
-button_projection = 1.5; // [0.5:0.1:3]
-button_cap_size = [5, 3.2];
-button_flange_size = [6.6, 3.6];
-button_flange_thickness = 0.9;
-button_travel = 0.5;
-button_contact_extension = 0.7;
-
-/* [Battery and switch] */
-battery_enabled = false;
-battery_length = 69;
-battery_diameter = 18;
-battery_radial_clearance = 0.6;
-battery_end_clearance = 1;
-switch_hole_diameter = 12;
-switch_hole_compensation = 0.3;
-switch_cap_diameter = 8;
-switch_flange_diameter = 16.2;
-switch_body_length = 24;
-switch_body_diameter = 12;
-switch_wire_allowance = 3;
-
-/* [Tripod mount] */
-tripod_insert_enabled = false;
-tripod_insert_length = 6.4;
-tripod_insert_hole_diameter = 8.8;
-tripod_thread_clearance_diameter = 6.8;
-tripod_boss_diameter = 14;
-
-/* [M2.5 inserts] */
-m25_insert_length = 4;
-m25_insert_hole_diameter = 3.7;
-m25_screw_clearance = 2.8;
-m25_boss_diameter = 7;
-insert_entry_chamfer = 0.6;
-insert_melt_relief = 0.8;
-
-/* [Shell and fit] */
-wall_thickness = 2.4;
-floor_thickness = 2.4;
-lid_thickness = 3.2;
-corner_radius = 4;
-board_bottom_clearance = 5.4;
-board_side_clearance = 7;
-board_rear_clearance = 4;
-usb_board_wall_gap = 1.2;
-lid_lip_depth = 2.4;
-lid_lip_thickness = 1.2;
-fit_clearance = 0.35;
-hole_compensation = 0.2;
-lid_screw_head_diameter = 5.2;
-lid_screw_head_height = 2.5;
-
-/* [USB-C opening] */
-usb_opening_width = 12.5;
-usb_opening_height = 7;
-usb_opening_radius = 1.5;
-usb_vertical_offset = 0;
-
-/* [Custom wall cutouts] */
-// Entry format: [face, shape, u, z, width, height, radius]
-// face: front, rear, left, right. u is Y on front/rear and X on left/right.
-// shape: circle, rect, roundrect, slot. Circle uses width as its diameter.
-extra_cutouts = [];
-
-/* [Calibration] */
-coupon_steps = [-0.3, -0.15, 0, 0.15, 0.3];
-
-$fn = $preview ? 36 : 72;
-eps = 0.02;
-
-// Adafruit Feather mechanical reference, millimetres.
-feather_length = 50.8;
-feather_width = 22.86;
-board_thickness = 1.6;
-mount_x = [2.54, 48.26];
-mount_y = [2.54, 20.32];
-usb_center_y = 11.43;
-
-// Official 128x64 OLED FeatherWing geometry in Feather-board coordinates.
-oled_visible_min = [11.42, 3.78];
-oled_visible_size = [30, 15.3];
-oled_button_a_xy = [4.318, 15.875];
-oled_button_b_xy = [4.318, 11.43];
-oled_button_c_xy = [4.318, 6.985];
-oled_button_reset_xy = [7.366, 20.828];
-
-effective_floor = tripod_insert_enabled
-    ? max(floor_thickness, tripod_insert_length + insert_melt_relief + 1.2)
-    : floor_thickness;
-effective_board_clearance = max(
-    board_bottom_clearance,
-    m25_insert_length + insert_melt_relief + 0.6
-);
-
-board_origin_x = wall_thickness + usb_board_wall_gap;
-board_origin_y = wall_thickness + board_side_clearance;
-board_bottom_z = effective_floor + effective_board_clearance;
-board_top_z = board_bottom_z + board_thickness;
-
-computed_top_pcb_z = board_top_z + wing_count * wing_pitch;
-top_pcb_z = stack_height_override > 0
-    ? board_top_z + stack_height_override
-    : computed_top_pcb_z;
-profile_component_height =
-    top_profile == "gps" ? gps_antenna_height :
-    top_profile == "oled128x64" ? oled_component_height :
-    generic_component_height;
-profile_top_gap =
-    top_profile == "gps" ? gps_top_gap :
-    top_profile == "oled128x64" ? oled_face_gap :
-    generic_top_gap;
-
-partition_y = board_origin_y + feather_width + 1;
-battery_center_y = partition_y + wall_thickness + battery_radial_clearance
-    + battery_diameter / 2;
-battery_start_x = board_origin_x + battery_end_clearance;
-battery_end_x = battery_start_x + battery_length;
-switch_center_x = battery_end_x + max(
-    switch_body_diameter / 2 + 0.8,
-    switch_flange_diameter / 2 + 0.5
-);
-
-case_length_plain = board_origin_x + feather_length
-    + board_rear_clearance + wall_thickness;
-case_length_battery = switch_center_x + switch_flange_diameter / 2
-    + 1.2 + wall_thickness;
-case_length = battery_enabled ? max(case_length_plain, case_length_battery)
-    : case_length_plain;
-
-case_width_plain = board_origin_y + feather_width
-    + board_side_clearance + wall_thickness;
-case_width_battery = battery_center_y + battery_diameter / 2
-    + battery_radial_clearance + wall_thickness;
-case_width = battery_enabled ? max(case_width_plain, case_width_battery)
-    : case_width_plain;
-
-battery_center_z = effective_floor + battery_radial_clearance
-    + battery_diameter / 2;
-switch_center_z = max(
-    effective_floor + switch_flange_diameter / 2 + 1,
-    battery_center_z
-);
-electronics_ceiling_z = top_pcb_z + profile_component_height + profile_top_gap;
-battery_ceiling_z = battery_enabled
-    ? max(
-        battery_center_z + battery_diameter / 2 + battery_radial_clearance,
-        switch_center_z + switch_flange_diameter / 2 + 1
-    )
-    : 0;
-body_height = max(electronics_ceiling_z, battery_ceiling_z);
-
-lid_boss_r = m25_boss_diameter / 2;
-lid_boss_wall_overlap = 0.6;
-lid_boss_xy = [
-    [
-        wall_thickness + lid_boss_r - lid_boss_wall_overlap,
-        wall_thickness + lid_boss_r - lid_boss_wall_overlap
-    ],
-    [
-        case_length - wall_thickness - lid_boss_r + lid_boss_wall_overlap,
-        wall_thickness + lid_boss_r - lid_boss_wall_overlap
-    ],
-    [
-        wall_thickness + lid_boss_r - lid_boss_wall_overlap,
-        case_width - wall_thickness - lid_boss_r + lid_boss_wall_overlap
-    ],
-    [
-        case_length - wall_thickness - lid_boss_r + lid_boss_wall_overlap,
-        case_width - wall_thickness - lid_boss_r + lid_boss_wall_overlap
-    ]
-];
-
-assert(wing_count >= 1, "wing_count must be at least one");
-assert(top_profile == "generic" || top_profile == "gps"
-    || top_profile == "oled128x64", "Unsupported top_profile");
-assert(wall_thickness >= 1.2, "wall_thickness is too small for 0.6 mm FDM");
-assert(lid_lip_thickness >= 1.2, "lid lip needs at least two 0.6 mm lines");
-assert(m25_boss_diameter > m25_insert_hole_diameter + 2,
-    "M2.5 boss does not have enough radial material");
-assert(!tripod_insert_enabled
-    || tripod_boss_diameter > tripod_insert_hole_diameter + 3,
-    "Tripod insert boss does not have enough radial material");
-
-function clamp(v, lo, hi) = min(max(v, lo), hi);
-
-module rounded_rect_2d(size, radius) {
-    r = clamp(radius, 0.01, min(size[0], size[1]) / 2 - 0.01);
-    hull() {
-        for (x = [r, size[0] - r], y = [r, size[1] - r])
-            translate([x, y]) circle(r = r);
-    }
-}
-
-module centered_rounded_rect_2d(size, radius) {
-    translate([-size[0] / 2, -size[1] / 2])
-        rounded_rect_2d(size, radius);
-}
-
-module centered_rounded_prism(size, height, radius) {
-    linear_extrude(height = height)
-        centered_rounded_rect_2d(size, radius);
-}
-
-module rounded_box(size, radius) {
-    linear_extrude(height = size[2])
-        rounded_rect_2d([size[0], size[1]], radius);
-}
-
-module insert_pocket(diameter, depth, entry_z, downward = true) {
-    bore_d = diameter + hole_compensation;
-    if (downward) {
-        translate([0, 0, entry_z - depth])
-            cylinder(h = depth + eps, d = bore_d);
-        translate([0, 0, entry_z - insert_entry_chamfer])
-            cylinder(
-                h = insert_entry_chamfer + eps,
-                d1 = bore_d,
-                d2 = bore_d + 2 * insert_entry_chamfer
-            );
-    } else {
-        translate([0, 0, entry_z - eps])
-            cylinder(h = depth + eps, d = bore_d);
-        translate([0, 0, entry_z - eps])
-            cylinder(
-                h = insert_entry_chamfer + eps,
-                d1 = bore_d + 2 * insert_entry_chamfer,
-                d2 = bore_d
-            );
-    }
-}
-
-module face_rounded_cutout(face, u, z, width, height, radius) {
-    r = clamp(radius, 0.01, min(width, height) / 2);
-    depth = wall_thickness + 2 * eps;
-    if (face == "front" || face == "rear") {
-        x0 = face == "front" ? -eps : case_length - wall_thickness - eps;
-        hull()
-            for (yy = [u - width / 2 + r, u + width / 2 - r],
-                 zz = [z - height / 2 + r, z + height / 2 - r])
-                translate([x0, yy, zz])
-                    rotate([0, 90, 0]) cylinder(h = depth, r = r);
-    } else if (face == "left" || face == "right") {
-        y0 = face == "left" ? -eps : case_width - wall_thickness - eps;
-        hull()
-            for (xx = [u - width / 2 + r, u + width / 2 - r],
-                 zz = [z - height / 2 + r, z + height / 2 - r])
-                translate([xx, y0, zz])
-                    rotate([-90, 0, 0]) cylinder(h = depth, r = r);
-    }
-}
-
-module face_circle_cutout(face, u, z, diameter) {
-    depth = wall_thickness + 2 * eps;
-    if (face == "front")
-        translate([-eps, u, z])
-            rotate([0, 90, 0]) cylinder(h = depth, d = diameter);
-    else if (face == "rear")
-        translate([case_length - wall_thickness - eps, u, z])
-            rotate([0, 90, 0]) cylinder(h = depth, d = diameter);
-    else if (face == "left")
-        translate([u, -eps, z])
-            rotate([-90, 0, 0]) cylinder(h = depth, d = diameter);
-    else if (face == "right")
-        translate([u, case_width - wall_thickness - eps, z])
-            rotate([-90, 0, 0]) cylinder(h = depth, d = diameter);
-}
-
-module custom_wall_cutout(entry) {
-    face = entry[0];
-    shape = entry[1];
-    u = entry[2];
-    z = entry[3];
-    width = entry[4];
-    height = len(entry) > 5 ? entry[5] : width;
-    radius = len(entry) > 6 ? entry[6] : min(width, height) / 2;
-    assert(face == "front" || face == "rear"
-        || face == "left" || face == "right", "Invalid cutout face");
-    assert(shape == "circle" || shape == "rect"
-        || shape == "roundrect" || shape == "slot", "Invalid cutout shape");
-    assert(z - height / 2 >= effective_floor,
-        "Cutout intersects the floor");
-    assert(z + height / 2 <= body_height - lid_lip_depth,
-        "Cutout intersects the lid locating lip");
-    assert(
-        (face == "front" || face == "rear")
-            ? u - width / 2 >= 0 && u + width / 2 <= case_width
-            : u - width / 2 >= 0 && u + width / 2 <= case_length,
-        "Cutout extends beyond its wall"
-    );
-
-    if (shape == "circle")
-        face_circle_cutout(face, u, z, width);
-    else
-        face_rounded_cutout(
-            face, u, z, width, height,
-            shape == "rect" ? 0.02 :
-            shape == "slot" ? min(width, height) / 2 : radius
-        );
-}
-
-module board_standoffs() {
-    for (mx = mount_x, my = mount_y)
-        translate([
-            board_origin_x + mx,
-            board_origin_y + my,
-            effective_floor - eps
-        ])
-            cylinder(
-                h = effective_board_clearance + eps,
-                d = m25_boss_diameter
-            );
-}
-
-module lid_bosses() {
-    for (p = lid_boss_xy)
-        translate([p[0], p[1], effective_floor - eps])
-            cylinder(
-                h = body_height - effective_floor + eps,
-                d = m25_boss_diameter
-            );
-}
-
-module battery_cradle() {
-    partition_height = min(
-        body_height - lid_lip_depth - 0.5,
-        battery_center_z + battery_diameter / 2 + 1.5
-    );
-    rib_width = 2.4;
-    rib_positions = [
-        battery_start_x + 4,
-        (battery_start_x + battery_end_x) / 2,
-        battery_end_x - 4
-    ];
-
-    // Board/battery partition, with a lead-routing notch near the JST end.
-    difference() {
-        translate([wall_thickness, partition_y, effective_floor - eps])
-            cube([
-                battery_end_x - wall_thickness + battery_end_clearance,
-                wall_thickness,
-                partition_height - effective_floor + eps
-            ]);
-        translate([
-            board_origin_x + 6.5,
-            partition_y - eps,
-            effective_floor + 1.5
-        ])
-            cube([9, wall_thickness + 2 * eps, 6]);
-    }
-
-    // Three low curved ribs cradle the protected cylindrical pack.
-    for (x = rib_positions)
-        difference() {
-            translate([
-                x - rib_width / 2,
-                battery_center_y - battery_diameter / 2
-                    - battery_radial_clearance,
-                effective_floor - eps
-            ])
-                cube([
-                    rib_width,
-                    battery_diameter + 2 * battery_radial_clearance,
-                    battery_diameter / 2 + battery_radial_clearance + eps
-                ]);
-            translate([x - rib_width, battery_center_y, battery_center_z])
-                rotate([0, 90, 0])
-                    cylinder(
-                        h = rib_width * 2,
-                        d = battery_diameter + 2 * battery_radial_clearance
-                    );
-        }
-
-    // End stops remain below the cell center so the lid can remove vertically.
-    for (x = [
-        battery_start_x - battery_end_clearance - wall_thickness,
-        battery_end_x + battery_end_clearance
-    ])
-        translate([
-            x,
-            battery_center_y - battery_diameter / 2 - battery_radial_clearance,
-            effective_floor - eps
-        ])
-            cube([
-                wall_thickness,
-                battery_diameter + 2 * battery_radial_clearance,
-                battery_diameter / 2 + 1 + eps
-            ]);
-
-    // Rear cross-strip separates the side-mounted switch body from the cell.
-    translate([
-        battery_end_x + battery_end_clearance,
-        partition_y,
-        effective_floor - eps
-    ])
-        cube([
-            case_length - wall_thickness - battery_end_x - battery_end_clearance,
-            case_width - wall_thickness - partition_y,
-            min(body_height - effective_floor, switch_center_z
-                + switch_body_diameter / 2 + switch_wire_allowance
-                - effective_floor) + eps
-        ]);
-}
-
-module body_positive() {
-    union() {
-        difference() {
-            rounded_box([case_length, case_width, body_height], corner_radius);
-            translate([wall_thickness, wall_thickness, effective_floor])
-                rounded_box([
-                    case_length - 2 * wall_thickness,
-                    case_width - 2 * wall_thickness,
-                    body_height - effective_floor + eps
-                ], max(0.6, corner_radius - wall_thickness));
-        }
-        board_standoffs();
-        lid_bosses();
-        if (battery_enabled)
-            battery_cradle();
-        if (tripod_insert_enabled)
-            translate([case_length / 2, case_width / 2, 0])
-                cylinder(h = effective_floor, d = tripod_boss_diameter);
-    }
-}
-
-module body_cutouts() {
-    // Board mounting insert pockets, loaded from above before the Feather.
-    for (mx = mount_x, my = mount_y)
-        translate([board_origin_x + mx, board_origin_y + my, 0])
-            insert_pocket(
-                m25_insert_hole_diameter,
-                m25_insert_length + insert_melt_relief,
-                board_bottom_z
-            );
-
-    // Lid insert pockets, loaded from the top of the body.
-    for (p = lid_boss_xy)
-        translate([p[0], p[1], 0])
-            insert_pocket(
-                m25_insert_hole_diameter,
-                m25_insert_length + insert_melt_relief,
-                body_height
-            );
-
-    // USB-C cable opening. Connector center is from the official ESP32 V2 PCB.
-    usb_center_z = board_top_z + 1.6 + usb_vertical_offset;
-    face_rounded_cutout(
-        "front",
-        board_origin_y + usb_center_y,
-        usb_center_z,
-        usb_opening_width + hole_compensation,
-        usb_opening_height + hole_compensation,
-        usb_opening_radius
-    );
-
-    if (battery_enabled) {
-        face_circle_cutout(
-            "right",
-            switch_center_x,
-            switch_center_z,
-            switch_hole_diameter + switch_hole_compensation
-        );
-        // Clear the switch body and its prewired terminals through the rear bay.
-        translate([
-            switch_center_x,
-            case_width - wall_thickness + eps,
-            switch_center_z
-        ])
-            rotate([90, 0, 0])
-                cylinder(
-                    h = switch_body_length + switch_wire_allowance
-                        + wall_thickness + eps,
-                    d = switch_body_diameter + 2 * fit_clearance
-                );
-    }
-
-    if (tripod_insert_enabled) {
-        translate([case_length / 2, case_width / 2, 0]) {
-            translate([0, 0, -eps])
-                cylinder(
-                    h = effective_floor + 2 * eps,
-                    d = tripod_thread_clearance_diameter + hole_compensation
-                );
-            insert_pocket(
-                tripod_insert_hole_diameter,
-                tripod_insert_length + insert_melt_relief,
-                effective_floor
-            );
-        }
-    }
-
-    for (entry = extra_cutouts)
-        custom_wall_cutout(entry);
-}
-
-module body() {
-    difference() {
-        body_positive();
-        body_cutouts();
-    }
-}
-
-module lid_plate_positive() {
-    union() {
-        rounded_box([case_length, case_width, lid_thickness], corner_radius);
-        // Inset rim: exported pointing upward so the outer lid face prints flat.
-        translate([
-            wall_thickness + fit_clearance,
-            wall_thickness + fit_clearance,
-            lid_thickness
-        ])
-            linear_extrude(height = lid_lip_depth)
-                difference() {
-                    rounded_rect_2d([
-                        case_length - 2 * (wall_thickness + fit_clearance),
-                        case_width - 2 * (wall_thickness + fit_clearance)
-                    ], max(0.6, corner_radius - wall_thickness));
-                    translate([lid_lip_thickness, lid_lip_thickness])
-                        rounded_rect_2d([
-                            case_length - 2 * (
-                                wall_thickness + fit_clearance
-                                + lid_lip_thickness
-                            ),
-                            case_width - 2 * (
-                                wall_thickness + fit_clearance
-                                + lid_lip_thickness
-                            )
-                        ], max(0.5, corner_radius - wall_thickness
-                            - lid_lip_thickness));
-                }
-    }
-}
-
-module beveled_oled_window() {
-    inner_size = oled_visible_size;
-    outer_size = [oled_visible_size[0] + 3, oled_visible_size[1] + 3];
-    center = [
-        board_origin_x + oled_visible_min[0] + oled_visible_size[0] / 2,
-        board_origin_y + oled_visible_min[1] + oled_visible_size[1] / 2
-    ];
-    hull() {
-        translate([center[0], center[1], -eps])
-            linear_extrude(height = eps)
-                centered_rounded_rect_2d(outer_size, 1.5);
-        translate([center[0], center[1], lid_thickness - eps])
-            linear_extrude(height = 2 * eps)
-                centered_rounded_rect_2d(inner_size, 0.8);
-    }
-}
-
-module oled_button_lid_cutout(xy) {
-    center = [board_origin_x + xy[0], board_origin_y + xy[1]];
-    shaft_size = [
-        button_cap_size[0] + fit_clearance * 2,
-        button_cap_size[1] + fit_clearance * 2
-    ];
-    recess_size = [
-        button_flange_size[0] + fit_clearance * 2,
-        button_flange_size[1] + fit_clearance * 2
-    ];
-    recess_depth = button_flange_thickness + button_travel;
-    translate([center[0], center[1], -eps])
-        centered_rounded_prism(
-            shaft_size,
-            lid_thickness + 2 * eps,
-            shaft_size[1] / 2
-        );
-    translate([center[0], center[1], lid_thickness - recess_depth])
-        centered_rounded_prism(
-            recess_size,
-            recess_depth + lid_lip_depth + eps,
-            recess_size[1] / 2
-        );
-}
-
-module lid_cutouts() {
-    // Through holes plus shallow counterbores for flush M2.5 socket heads.
-    for (p = lid_boss_xy) {
-        translate([p[0], p[1], -eps])
-            cylinder(
-                h = lid_thickness + lid_lip_depth + 2 * eps,
-                d = m25_screw_clearance + hole_compensation
-            );
-        translate([p[0], p[1], -eps])
-            cylinder(
-                h = lid_screw_head_height + eps,
-                d = lid_screw_head_diameter + hole_compensation
-            );
-    }
-
-    if (top_profile == "oled128x64") {
-        beveled_oled_window();
-        if (button_a) oled_button_lid_cutout(oled_button_a_xy);
-        if (button_b) oled_button_lid_cutout(oled_button_b_xy);
-        if (button_c) oled_button_lid_cutout(oled_button_c_xy);
-        if (button_reset) oled_button_lid_cutout(oled_button_reset_xy);
-    }
-}
-
-module lid() {
-    difference() {
-        lid_plate_positive();
-        lid_cutouts();
-    }
-}
-
-module one_oled_button() {
-    recess_depth = button_flange_thickness + button_travel;
-    stem_height = lid_thickness - recess_depth + button_projection;
-    // Print outer cap face down. The flange and contact nub build upward.
-    centered_rounded_prism(
-        button_cap_size,
-        stem_height,
-        button_cap_size[1] / 2
-    );
-    translate([0, 0, stem_height])
-        centered_rounded_prism(
-            button_flange_size,
-            button_flange_thickness,
-            button_flange_size[1] / 2
-        );
-    translate([0, 0, stem_height + button_flange_thickness])
-        cylinder(h = button_contact_extension, d = 3);
-}
-
-module buttons() {
-    enabled = [
-        button_a,
-        button_b,
-        button_c,
-        button_reset
-    ];
-    count_enabled = len([for (v = enabled) if (v) 1]);
-    if (count_enabled == 0)
-        echo("No OLED buttons are enabled.");
-    for (i = [0 : len(enabled) - 1])
-        if (enabled[i])
-            translate([i * (button_flange_size[0] + 3), 0, 0])
-                one_oled_button();
-}
-
-module reference_board() {
-    color([0.05, 0.25, 0.55, 0.75])
-        translate([board_origin_x, board_origin_y, board_bottom_z])
-            rounded_box([feather_length, feather_width, board_thickness], 2.54);
-    color([0.12, 0.45, 0.75, 0.45])
-        for (i = [1 : wing_count])
-            translate([
-                board_origin_x,
-                board_origin_y,
-                board_top_z + i * wing_pitch - board_thickness
-            ])
-                rounded_box(
-                    [feather_length, feather_width, board_thickness], 2.54
-                );
-}
-
-module reference_top_feature() {
-    if (top_profile == "gps")
-        color([0.92, 0.78, 0.35, 0.8])
-            translate([
-                board_origin_x + 31,
-                board_origin_y + (feather_width - 15) / 2,
-                top_pcb_z
-            ])
-                cube([15, 15, gps_antenna_height]);
-    else if (top_profile == "oled128x64") {
-        color([0.12, 0.12, 0.12, 0.9])
-            translate([
-                board_origin_x + oled_visible_min[0],
-                board_origin_y + oled_visible_min[1],
-                top_pcb_z
-            ])
-                cube([
-                    oled_visible_size[0],
-                    oled_visible_size[1],
-                    oled_display_height
-                ]);
-        color([0.6, 0.6, 0.6, 0.9])
-            for (xy = [
-                oled_button_a_xy,
-                oled_button_b_xy,
-                oled_button_c_xy,
-                oled_button_reset_xy
-            ])
-                translate([
-                    board_origin_x + xy[0],
-                    board_origin_y + xy[1],
-                    top_pcb_z
-                ])
-                    cylinder(h = 1.6, d = 2.1);
-    } else
-        color([0.3, 0.65, 0.35, 0.6])
-            translate([
-                board_origin_x + 10,
-                board_origin_y + 4,
-                top_pcb_z
-            ])
-                cube([
-                    feather_length - 20,
-                    feather_width - 8,
-                    generic_component_height
-                ]);
-}
-
-module reference_battery_and_switch() {
-    if (battery_enabled) {
-        color([0.35, 0.18, 0.55, 0.75])
-            translate([battery_start_x, battery_center_y, battery_center_z])
-                rotate([0, 90, 0])
-                    cylinder(h = battery_length, d = battery_diameter);
-        color([0.8, 0.15, 0.1, 0.65])
-            translate([
-                switch_center_x,
-                case_width - wall_thickness,
-                switch_center_z
-            ])
-                rotate([90, 0, 0]) {
-                    cylinder(h = switch_body_length, d = switch_body_diameter);
-                    translate([0, 0, -1.5])
-                        cylinder(h = 1.5, d = switch_flange_diameter);
-                    translate([0, 0, -3])
-                        cylinder(h = 3, d = switch_cap_diameter);
-                }
-    }
-}
-
-module assembly() {
-    color([0.82, 0.84, 0.88, 1]) body();
-    if ($preview && show_references) {
-        reference_board();
-        reference_top_feature();
-        reference_battery_and_switch();
-    }
-    // Printable lid is mirrored into its installed orientation and exploded up.
-    color([0.92, 0.92, 0.95, 0.88])
-        translate([0, case_width, body_height + lid_thickness + exploded_view])
-            rotate([180, 0, 0])
-                lid();
-}
-
-module coupon_hole(x, y, diameter, depth) {
-    translate([x, y, -eps]) cylinder(h = depth + 2 * eps, d = diameter);
-}
-
-module insert_coupon() {
-    spacing = 15;
-    coupon_length = spacing * len(coupon_steps) + 8;
-    coupon_width = 32;
-    coupon_height = max(
-        m25_insert_length + insert_melt_relief + 1.2,
-        tripod_insert_length + insert_melt_relief + 1.2
-    );
-    difference() {
-        rounded_box([coupon_length, coupon_width, coupon_height], 3);
-        for (i = [0 : len(coupon_steps) - 1]) {
-            x = 7 + i * spacing;
-            coupon_hole(
-                x, 8,
-                m25_insert_hole_diameter + coupon_steps[i],
-                m25_insert_length + insert_melt_relief
-            );
-            coupon_hole(
-                x, 23,
-                tripod_insert_hole_diameter + coupon_steps[i],
-                tripod_insert_length + insert_melt_relief
-            );
-        }
-    }
-}
-
-module switch_coupon() {
-    spacing = 18;
-    coupon_length = spacing * len(coupon_steps) + 6;
-    coupon_width = 24;
-    coupon_height = wall_thickness;
-    difference() {
-        rounded_box([coupon_length, coupon_width, coupon_height], 3);
-        for (i = [0 : len(coupon_steps) - 1])
-            translate([6 + i * spacing, coupon_width / 2, -eps])
-                cylinder(
-                    h = coupon_height + 2 * eps,
-                    d = switch_hole_diameter + coupon_steps[i]
-                );
-    }
-}
-
-module fit_coupon() {
-    segment_length = 34;
-    base_width = 16;
-    base_height = 6;
-    cavity_size = [segment_length - 8, base_width - 8];
-    male_size = [
-        cavity_size[0] - 2 * fit_clearance,
-        cavity_size[1] - 2 * fit_clearance
-    ];
-    difference() {
-        rounded_box([segment_length, base_width, base_height], 2);
-        translate([4, 4, 2])
-            cube([segment_length - 8, base_width - 8, base_height]);
-    }
-    translate([segment_length + 5, 0, 0])
-        union() {
-            cube([segment_length, base_width, lid_thickness]);
-            translate([
-                4 + fit_clearance,
-                4 + fit_clearance,
-                lid_thickness - eps
-            ])
-                linear_extrude(height = lid_lip_depth + eps)
-                    difference() {
-                        rounded_rect_2d(male_size, 1);
-                        translate([lid_lip_thickness, lid_lip_thickness])
-                            rounded_rect_2d([
-                                male_size[0] - 2 * lid_lip_thickness,
-                                male_size[1] - 2 * lid_lip_thickness
-                            ], 0.5);
-                    }
-        }
-}
-
-if (part == "assembly")
-    assembly();
-else if (part == "body")
-    body();
-else if (part == "lid")
-    lid();
-else if (part == "buttons")
-    buttons();
-else if (part == "insert_coupon")
-    insert_coupon();
-else if (part == "switch_coupon")
-    switch_coupon();
-else if (part == "fit_coupon")
-    fit_coupon();
-else
-    assert(false, str("Unknown part: ", part));
diff --git a/cases/attitude-imu/source/render_stl_previews.py b/cases/attitude-imu/source/render_stl_previews.py
deleted file mode 100644
index c8675ac..0000000
--- a/cases/attitude-imu/source/render_stl_previews.py
+++ /dev/null
@@ -1,127 +0,0 @@
-"""Render six inspection views of an STL using Blender.
-
-Usage:
-    blender --background --python tools/render_stl_previews.py -- \
-        input.stl output-directory basename [comma-separated-views]
-"""
-
-import os
-import sys
-
-import bpy
-from mathutils import Vector
-
-
-def arguments():
-    args = sys.argv[sys.argv.index("--") + 1 :]
-    if len(args) not in (3, 4):
-        raise SystemExit(
-            "expected: input.stl output-directory basename [comma-separated-views]"
-        )
-    requested_views = args[3].split(",") if len(args) == 4 else None
-    return args[0], args[1], args[2], requested_views
-
-
-def look_at(camera, target):
-    direction = Vector(target) - camera.location
-    camera.rotation_euler = direction.to_track_quat("-Z", "Y").to_euler()
-
-
-def render_view(camera, center, span, name, direction, output_dir, basename):
-    distance = span * 2.2
-    camera.location = Vector(center) + Vector(direction).normalized() * distance
-    look_at(camera, center)
-    camera.data.type = "ORTHO"
-    camera.data.ortho_scale = span * 1.35
-    bpy.context.scene.render.filepath = os.path.join(
-        output_dir, f"{basename}_{name}.png"
-    )
-    bpy.ops.render.render(write_still=True)
-
-
-def main():
-    input_path, output_dir, basename, requested_views = arguments()
-    os.makedirs(output_dir, exist_ok=True)
-
-    bpy.ops.wm.read_factory_settings(use_empty=True)
-    bpy.ops.wm.stl_import(filepath=os.path.abspath(input_path))
-    model = bpy.context.selected_objects[0]
-    model.name = "Feather case"
-
-    material = bpy.data.materials.new("Case material")
-    material.diffuse_color = (0.16, 0.42, 0.72, 1.0)
-    material.metallic = 0.0
-    material.roughness = 0.45
-    model.data.materials.append(material)
-
-    corners = [model.matrix_world @ Vector(corner) for corner in model.bound_box]
-    mins = Vector([min(v[i] for v in corners) for i in range(3)])
-    maxs = Vector([max(v[i] for v in corners) for i in range(3)])
-    center = (mins + maxs) / 2
-    span = max(maxs - mins)
-
-    world = bpy.data.worlds.new("Inspection world")
-    world.use_nodes = True
-    world.node_tree.nodes["Background"].inputs["Color"].default_value = (
-        0.035,
-        0.04,
-        0.05,
-        1,
-    )
-    world.node_tree.nodes["Background"].inputs["Strength"].default_value = 0.5
-    bpy.context.scene.world = world
-
-    camera_data = bpy.data.cameras.new("Camera")
-    camera = bpy.data.objects.new("Camera", camera_data)
-    bpy.context.collection.objects.link(camera)
-    bpy.context.scene.camera = camera
-
-    key_data = bpy.data.lights.new("Key", type="AREA")
-    key_data.energy = 900
-    key_data.shape = "DISK"
-    key_data.size = span
-    key = bpy.data.objects.new("Key", key_data)
-    key.location = center + Vector((span, -span, span * 1.5))
-    bpy.context.collection.objects.link(key)
-
-    fill_data = bpy.data.lights.new("Fill", type="AREA")
-    fill_data.energy = 500
-    fill_data.size = span
-    fill = bpy.data.objects.new("Fill", fill_data)
-    fill.location = center + Vector((-span, span, span))
-    bpy.context.collection.objects.link(fill)
-
-    scene = bpy.context.scene
-    scene.render.engine = "BLENDER_WORKBENCH"
-    scene.render.resolution_x = 800
-    scene.render.resolution_y = 600
-    scene.render.resolution_percentage = 100
-    scene.render.image_settings.file_format = "PNG"
-    scene.render.film_transparent = False
-    scene.display.shading.light = "STUDIO"
-    scene.display.shading.color_type = "MATERIAL"
-    scene.display.shading.show_shadows = True
-    scene.display.shading.show_cavity = True
-    scene.display.shading.cavity_type = "BOTH"
-    scene.display.shading.curvature_ridge_factor = 1.5
-    scene.display.shading.curvature_valley_factor = 1.2
-
-    views = {
-        "iso": (1, -1, 0.8),
-        "front": (-1, 0, 0),
-        "back": (1, 0, 0),
-        "left": (0, -1, 0),
-        "right": (0, 1, 0),
-        "top": (0, 0, 1),
-    }
-    selected = requested_views or list(views)
-    unknown = sorted(set(selected) - set(views))
-    if unknown:
-        raise SystemExit(f"unknown views: {', '.join(unknown)}")
-    for name in selected:
-        direction = views[name]
-        render_view(camera, center, span, name, direction, output_dir, basename)
-
-
-if __name__ == "__main__":
-    main()
diff --git a/cases/attitude-no-battery/README.md b/cases/attitude-no-battery/README.md
index 816c351..8c279d6 100644
--- a/cases/attitude-no-battery/README.md
+++ b/cases/attitude-no-battery/README.md
@@ -6,7 +6,7 @@ Generated by the Feather Case Wizard.
 - FeatherWings: 1
 - Battery compartment: no
 - 1/4-20 insert: yes
-- Approximate exterior: 60.8 × 41.7 × 33.2 mm
+- Approximate exterior: 61.6 × 41.7 × 34.4 mm
 - Formats: 3mf
 - Parts: `body`, `lid`, `lid_base`, `lid_accent`
 - Custom cutouts: 0
diff --git a/cases/attitude-no-battery/case.yml b/cases/attitude-no-battery/case.yml
index e0b2c8c..d70f869 100644
--- a/cases/attitude-no-battery/case.yml
+++ b/cases/attitude-no-battery/case.yml
@@ -3,18 +3,19 @@ schema_version: 1
 name: Attitude no battery
 slug: attitude-no-battery
 generator:
-  sha256: daeb9015a2bd04a16a75b77b32ee84bca2a9e2a4f4fe16605f3d5dc7e6d53036
+  sha256: 281917098487eeacd19a136ba27752698712e90cb4c03c6525a1ea3167c9ea13
   created_with: feather-case-wizard
 parameters:
   top_profile: generic
   wing_count: 1
-  wing_pitch: 11.0
+  wing_pitch: 12.25
   stack_height_override: 0.0
   generic_component_height: 3.0
   generic_top_gap: 2.0
-  gps_antenna_height: 4.0
+  gps_antenna_height: 6.0
   gps_top_gap: 5.0
   oled_component_height: 2.4
+  oled_display_height: 1.5
   oled_face_gap: 0.8
   button_a: true
   button_b: true
@@ -36,6 +37,7 @@ parameters:
   battery_radial_clearance: 0.6
   battery_end_clearance: 1.0
   battery_partition_thickness: 1.8
+  battery_board_clearance: 3.0
   rocker_cutout_size:
   - 12.9
   - 19.4
@@ -45,6 +47,10 @@ parameters:
   - 21.0
   - 21.0
   rocker_artwork_gap: 2.0
+  rocker_partition_offset: 2.0
+  rocker_tab_panel_thickness: 2.0
+  rocker_tab_land: 2.0
+  rocker_tab_taper_length: 0.6
   tripod_insert_enabled: true
   tripod_insert_length: 5.0
   tripod_insert_hole_diameter: 7.2
@@ -65,13 +71,19 @@ parameters:
   board_bottom_clearance: 5.4
   board_side_clearance: 7.0
   board_rear_clearance: 4.0
-  usb_board_wall_gap: 1.2
+  usb_board_wall_gap: 2.0
   lid_lip_depth: 2.4
   lid_lip_thickness: 1.2
   fit_clearance: 0.35
+  cutout_min_web: 1.2
   hole_compensation: 0.2
   lid_screw_head_diameter: 5.2
   lid_screw_head_height: 2.5
+  usb_opening_enabled: true
+  usb_guide_enabled: true
+  usb_connector_overhang: 2.0
+  usb_guide_wall_thickness: 1.2
+  usb_guide_end_gap: 1.0
   lid_label: IMU
   lid_logo_enabled: true
   lid_art_orientation: usb_front
@@ -80,10 +92,10 @@ parameters:
   lid_label_size: 5.0
   lid_label_logo_gap: 2.0
   lid_art_margin: 8.5
-  usb_opening_width: 12.5
-  usb_opening_height: 7.0
+  usb_opening_width: 13.5
+  usb_opening_height: 8.0
   usb_opening_radius: 1.5
-  usb_vertical_offset: 0.0
+  usb_vertical_offset: 0.5
 cutouts: []
 outputs:
   formats:
diff --git a/cases/attitude-no-battery/parameters.json b/cases/attitude-no-battery/parameters.json
index a4ded58..d12777d 100644
--- a/cases/attitude-no-battery/parameters.json
+++ b/cases/attitude-no-battery/parameters.json
@@ -3,13 +3,14 @@
     "attitude-no-battery": {
       "top_profile": "\"generic\"",
       "wing_count": "1",
-      "wing_pitch": "11.0",
+      "wing_pitch": "12.25",
       "stack_height_override": "0.0",
       "generic_component_height": "3.0",
       "generic_top_gap": "2.0",
-      "gps_antenna_height": "4.0",
+      "gps_antenna_height": "6.0",
       "gps_top_gap": "5.0",
       "oled_component_height": "2.4",
+      "oled_display_height": "1.5",
       "oled_face_gap": "0.8",
       "button_a": "true",
       "button_b": "true",
@@ -27,10 +28,15 @@
       "battery_radial_clearance": "0.6",
       "battery_end_clearance": "1.0",
       "battery_partition_thickness": "1.8",
+      "battery_board_clearance": "3.0",
       "rocker_cutout_size": "[12.9,19.4]",
       "rocker_corner_radius": "0.8",
       "rocker_body_size": "[15.0,21.0,21.0]",
       "rocker_artwork_gap": "2.0",
+      "rocker_partition_offset": "2.0",
+      "rocker_tab_panel_thickness": "2.0",
+      "rocker_tab_land": "2.0",
+      "rocker_tab_taper_length": "0.6",
       "tripod_insert_enabled": "true",
       "tripod_insert_length": "5.0",
       "tripod_insert_hole_diameter": "7.2",
@@ -51,13 +57,19 @@
       "board_bottom_clearance": "5.4",
       "board_side_clearance": "7.0",
       "board_rear_clearance": "4.0",
-      "usb_board_wall_gap": "1.2",
+      "usb_board_wall_gap": "2.0",
       "lid_lip_depth": "2.4",
       "lid_lip_thickness": "1.2",
       "fit_clearance": "0.35",
+      "cutout_min_web": "1.2",
       "hole_compensation": "0.2",
       "lid_screw_head_diameter": "5.2",
       "lid_screw_head_height": "2.5",
+      "usb_opening_enabled": "true",
+      "usb_guide_enabled": "true",
+      "usb_connector_overhang": "2.0",
+      "usb_guide_wall_thickness": "1.2",
+      "usb_guide_end_gap": "1.0",
       "lid_label": "\"IMU\"",
       "lid_logo_enabled": "true",
       "lid_art_orientation": "\"usb_front\"",
@@ -66,10 +78,10 @@
       "lid_label_size": "5.0",
       "lid_label_logo_gap": "2.0",
       "lid_art_margin": "8.5",
-      "usb_opening_width": "12.5",
-      "usb_opening_height": "7.0",
+      "usb_opening_width": "13.5",
+      "usb_opening_height": "8.0",
       "usb_opening_radius": "1.5",
-      "usb_vertical_offset": "0.0"
+      "usb_vertical_offset": "0.5"
     }
   },
   "fileFormatVersion": "1"
diff --git a/cases/attitude-no-battery/source/feather_case.scad b/cases/attitude-no-battery/source/feather_case.scad
index 3a33f30..92aab0f 100644
--- a/cases/attitude-no-battery/source/feather_case.scad
+++ b/cases/attitude-no-battery/source/feather_case.scad
@@ -19,13 +19,14 @@ show_references = true;
 /* [Stack] */
 top_profile = "generic"; // [generic,gps,oled128x64]
 wing_count = 1; // [1:1:8]
-wing_pitch = 11; // [7:0.1:16]
+wing_pitch = 12.25; // [7:0.1:16]
 stack_height_override = 0; // [0:0.1:100]
 generic_component_height = 3; // [0:0.1:30]
 generic_top_gap = 2; // [0.5:0.1:10]
-gps_antenna_height = 4;
+gps_antenna_height = 6;
 gps_top_gap = 5;
 oled_component_height = 2.4;
+oled_display_height = 1.5;
 oled_face_gap = 0.8;
 
 /* [OLED controls] */
@@ -47,10 +48,15 @@ battery_diameter = 18;
 battery_radial_clearance = 0.6;
 battery_end_clearance = 1;
 battery_partition_thickness = 1.8;
+battery_board_clearance = 3;
 rocker_cutout_size = [12.9, 19.4];
 rocker_corner_radius = 0.8;
 rocker_body_size = [15, 21, 21];
 rocker_artwork_gap = 2;
+rocker_partition_offset = 2;
+rocker_tab_panel_thickness = 2;
+rocker_tab_land = 2;
+rocker_tab_taper_length = 0.6;
 
 /* [Tripod mount] */
 tripod_insert_enabled = false;
@@ -77,10 +83,11 @@ corner_radius = 4;
 board_bottom_clearance = 5.4;
 board_side_clearance = 7;
 board_rear_clearance = 4;
-usb_board_wall_gap = 1.2;
+usb_board_wall_gap = 2;
 lid_lip_depth = 2.4;
 lid_lip_thickness = 1.2;
 fit_clearance = 0.35;
+cutout_min_web = 1.2;
 hole_compensation = 0.2;
 lid_screw_head_diameter = 5.2;
 lid_screw_head_height = 2.5;
@@ -97,10 +104,15 @@ lid_art_margin = 8.5;
 logo_file = "assets/NME-fixed.svg";
 
 /* [USB-C opening] */
-usb_opening_width = 12.5;
-usb_opening_height = 7;
+usb_opening_enabled = true;
+usb_guide_enabled = true;
+usb_connector_overhang = 2;
+usb_guide_wall_thickness = 1.2;
+usb_guide_end_gap = 1;
+usb_opening_width = 13.5;
+usb_opening_height = 8;
 usb_opening_radius = 1.5;
-usb_vertical_offset = 0;
+usb_vertical_offset = 0.5;
 
 /* [Custom wall cutouts] */
 // Entry format: [face, shape, u, z, width, height, radius]
@@ -156,6 +168,20 @@ board_origin_y = wall_thickness + board_side_clearance
     + combined_tripod_board_gutter;
 board_bottom_z = effective_floor + effective_board_clearance;
 board_top_z = board_bottom_z + board_thickness;
+usb_center_u = board_origin_y + usb_center_y;
+usb_center_z = board_top_z + 1.6 + usb_vertical_offset;
+usb_inner_width = usb_opening_width + hole_compensation;
+usb_inner_height = usb_opening_height + hole_compensation;
+usb_guide_length = max(
+    0,
+    usb_board_wall_gap - usb_connector_overhang - usb_guide_end_gap
+);
+usb_guide_active = usb_opening_enabled && usb_guide_enabled
+    && usb_guide_length > 0;
+usb_reserved_width = usb_inner_width
+    + (usb_guide_active ? 2 * usb_guide_wall_thickness : 0);
+usb_reserved_height = usb_inner_height
+    + (usb_guide_active ? 2 * usb_guide_wall_thickness : 0);
 
 computed_top_pcb_z = board_top_z + wing_count * wing_pitch;
 top_pcb_z = stack_height_override > 0
@@ -170,7 +196,7 @@ profile_top_gap =
     top_profile == "oled128x64" ? oled_face_gap :
     generic_top_gap;
 
-partition_y = board_origin_y + feather_width + 1;
+partition_y = board_origin_y + feather_width + battery_board_clearance;
 battery_center_y = partition_y + battery_partition_thickness
     + battery_radial_clearance + battery_diameter / 2;
 battery_start_x = front_lid_boss_center + lid_boss_r
@@ -191,10 +217,14 @@ case_width_battery = battery_center_y + battery_diameter / 2
 case_width = battery_enabled ? max(case_width_plain, case_width_battery)
     : case_width_plain;
 
-rocker_center_x = case_length - wall_thickness - fit_clearance
+rocker_installed_center_x = case_length - wall_thickness - fit_clearance
     - lid_lip_thickness - fit_clearance - rocker_body_size[0] / 2;
-rocker_center_y = front_lid_boss_center + lid_boss_r + fit_clearance
-    + rocker_body_size[1] / 2;
+rocker_installed_center_y = front_lid_boss_center + lid_boss_r + fit_clearance
+    + rocker_body_size[1] / 2 + rocker_partition_offset;
+// The printable lid is flipped across Y when installed, so its local cutout
+// coordinate must be mirrored from the assembled switch location.
+rocker_lid_center_x = rocker_installed_center_x;
+rocker_lid_center_y = case_width - rocker_installed_center_y;
 
 lid_artwork_enabled = lid_label != "" || lid_logo_enabled;
 lid_art_rotation =
@@ -202,7 +232,7 @@ lid_art_rotation =
     lid_art_orientation == "usb_front" ? 90 :
     lid_art_orientation == "usb_right" ? 180 : 270;
 lid_art_safe_max_x = battery_enabled
-    ? rocker_center_x - rocker_cutout_size[0] / 2 - rocker_artwork_gap
+    ? rocker_lid_center_x - rocker_cutout_size[0] / 2 - rocker_artwork_gap
     : case_length - lid_art_margin;
 lid_art_physical_size = [
     lid_art_safe_max_x - lid_art_margin,
@@ -273,6 +303,34 @@ lid_boss_xy = [
         case_width - wall_thickness - lid_boss_r + lid_boss_wall_overlap
     ]
 ];
+rocker_boss_clearance = min([
+    for (p = lid_boss_xy)
+        sqrt(
+            pow(max(
+                abs(p[0] - rocker_installed_center_x)
+                    - rocker_body_size[0] / 2,
+                0
+            ), 2)
+            + pow(max(
+                abs(p[1] - rocker_installed_center_y)
+                    - rocker_body_size[1] / 2,
+                0
+            ), 2)
+        ) - lid_boss_r
+]);
+rocker_relief_half_size = [
+    rocker_cutout_size[0] / 2,
+    rocker_cutout_size[1] / 2 + rocker_tab_land + rocker_tab_taper_length
+];
+rocker_relief_boss_clearance = min([
+    for (p = lid_boss_xy)
+        sqrt(
+            pow(max(abs(p[0] - rocker_lid_center_x)
+                - rocker_relief_half_size[0], 0), 2)
+            + pow(max(abs(p[1] - rocker_lid_center_y)
+                - rocker_relief_half_size[1], 0), 2)
+        ) - lid_boss_r
+]);
 
 assert(wing_count >= 1, "wing_count must be at least one");
 assert(top_profile == "generic" || top_profile == "gps"
@@ -280,6 +338,14 @@ assert(top_profile == "generic" || top_profile == "gps"
 assert(wall_thickness >= 1.2, "wall_thickness is too small for 0.6 mm FDM");
 assert(battery_partition_thickness >= 1.2,
     "battery_partition_thickness is too small for 0.6 mm FDM");
+assert(battery_board_clearance > 0,
+    "battery_board_clearance must be positive");
+assert(rocker_tab_panel_thickness >= 1.2,
+    "rocker tab panel needs at least two 0.6 mm lines");
+assert(rocker_tab_panel_thickness < lid_thickness,
+    "rocker tab panel must be thinner than the lid");
+assert(rocker_tab_land > 0 && rocker_tab_taper_length > 0,
+    "rocker tab relief land and taper must be positive");
 assert(lid_lip_thickness >= 1.2, "lid lip needs at least two 0.6 mm lines");
 assert(lid_art_orientation == "usb_left"
     || lid_art_orientation == "usb_front"
@@ -302,6 +368,15 @@ assert(m25_insert_outer_diameter >= m25_insert_hole_diameter,
 assert(!tripod_insert_enabled
     || tripod_boss_diameter > tripod_insert_hole_diameter + 3,
     "Tripod insert boss does not have enough radial material");
+assert(usb_opening_enabled || !usb_guide_enabled,
+    "USB guide requires the USB opening");
+assert(!usb_opening_enabled
+    || usb_center_z - usb_reserved_height / 2 >= effective_floor,
+    "USB opening or guide intersects the case floor");
+assert(!usb_opening_enabled
+    || usb_center_z + usb_reserved_height / 2
+        <= body_height - lid_lip_depth,
+    "USB opening or guide intersects the lid lip");
 assert(!tripod_insert_enabled
     || tripod_insert_outer_diameter >= tripod_insert_hole_diameter,
     "Tripod insert entry must not be smaller than its pilot");
@@ -311,18 +386,73 @@ assert(!battery_enabled || !tripod_insert_enabled
     || tripod_partition_clearance >= 1,
     "Tripod insert entry is too close to the battery partition");
 assert(!battery_enabled
-    || rocker_center_x - rocker_body_size[0] / 2
+    || rocker_installed_center_x - rocker_body_size[0] / 2
         >= board_origin_x + feather_length + fit_clearance,
     "Rocker body overlaps the Feather PCB");
 assert(!battery_enabled
-    || rocker_center_y + rocker_body_size[1] / 2
+    || rocker_installed_center_y + rocker_body_size[1] / 2
         <= partition_y - fit_clearance,
     "Rocker body overlaps the battery partition");
+assert(!battery_enabled
+    || rocker_installed_center_x - rocker_body_size[0] / 2
+        >= wall_thickness + lid_lip_thickness + fit_clearance,
+    "Rocker body overlaps the front lid lip");
+assert(!battery_enabled
+    || rocker_installed_center_x + rocker_body_size[0] / 2
+        <= case_length - wall_thickness - lid_lip_thickness - fit_clearance,
+    "Rocker body overlaps the rear lid lip");
+assert(!battery_enabled
+    || rocker_installed_center_y - rocker_body_size[1] / 2
+        >= wall_thickness + lid_lip_thickness + fit_clearance,
+    "Rocker body overlaps the Feather-side lid lip");
+assert(!battery_enabled || rocker_boss_clearance >= fit_clearance - eps,
+    "Rocker body overlaps a lid boss");
+assert(!battery_enabled
+    || rocker_relief_boss_clearance >= fit_clearance - eps,
+    "Rocker tab relief overlaps a lid boss scallop");
+assert(!battery_enabled
+    || abs(
+        case_width - rocker_lid_center_y - rocker_installed_center_y
+    ) < eps,
+    "Rocker lid cutout does not mirror to the installed switch location");
 assert(!battery_enabled
     || body_height - rocker_body_size[2] >= effective_floor,
     "Rocker body intersects the case floor");
 
 function clamp(v, lo, hi) = min(max(v, lo), hi);
+function cutout_height(entry) = len(entry) > 5 ? entry[5] : entry[4];
+function cutouts_separated(first, second, web) =
+    abs(first[2] - second[2])
+        >= (first[4] + second[4]) / 2 + web
+    || abs(first[3] - second[3])
+        >= (cutout_height(first) + cutout_height(second)) / 2 + web;
+function cutout_clear_of_usb(entry, web) =
+    abs(entry[2] - usb_center_u)
+        >= (entry[4] + usb_reserved_width) / 2 + web
+    || abs(entry[3] - usb_center_z)
+        >= (cutout_height(entry) + usb_reserved_height) / 2 + web;
+
+module validate_cutout_spacing() {
+    if (len(extra_cutouts) > 1)
+        for (first = [0 : len(extra_cutouts) - 2],
+             second = [first + 1 : len(extra_cutouts) - 1])
+            if (extra_cutouts[first][0] == extra_cutouts[second][0])
+                assert(
+                    cutouts_separated(
+                        extra_cutouts[first],
+                        extra_cutouts[second],
+                        cutout_min_web
+                    ),
+                    "Custom cutouts are too close on the same wall"
+                );
+    if (usb_opening_enabled)
+        for (entry = extra_cutouts)
+            if (entry[0] == "front")
+                assert(
+                    cutout_clear_of_usb(entry, cutout_min_web),
+                    "Front cutout is too close to the USB opening or guide"
+                );
+}
 
 module rounded_rect_2d(size, radius) {
     r = clamp(radius, 0.01, min(size[0], size[1]) / 2 - 0.01);
@@ -406,6 +536,40 @@ module face_circle_cutout(face, u, z, diameter) {
             rotate([-90, 0, 0]) cylinder(h = depth, d = diameter);
 }
 
+module x_rounded_prism(x, length, u, z, width, height, radius) {
+    r = clamp(radius, 0.01, min(width, height) / 2 - 0.01);
+    hull()
+        for (yy = [u - width / 2 + r, u + width / 2 - r],
+             zz = [z - height / 2 + r, z + height / 2 - r])
+            translate([x, yy, zz])
+                rotate([0, 90, 0]) cylinder(h = length, r = r);
+}
+
+module usb_guide_shell() {
+    outer_width = usb_inner_width + 2 * usb_guide_wall_thickness;
+    outer_height = usb_inner_height + 2 * usb_guide_wall_thickness;
+    difference() {
+        x_rounded_prism(
+            wall_thickness - eps,
+            usb_guide_length + 2 * eps,
+            usb_center_u,
+            usb_center_z,
+            outer_width,
+            outer_height,
+            usb_opening_radius + usb_guide_wall_thickness
+        );
+        x_rounded_prism(
+            wall_thickness - 2 * eps,
+            usb_guide_length + 4 * eps,
+            usb_center_u,
+            usb_center_z,
+            usb_inner_width,
+            usb_inner_height,
+            usb_opening_radius
+        );
+    }
+}
+
 module custom_wall_cutout(entry) {
     face = entry[0];
     shape = entry[1];
@@ -554,6 +718,8 @@ module body_positive() {
         if (tripod_insert_enabled)
             translate([tripod_center_x, tripod_center_y, 0])
                 cylinder(h = effective_floor, d = tripod_boss_diameter);
+        if (usb_guide_active)
+            usb_guide_shell();
     }
 }
 
@@ -579,15 +745,15 @@ module body_cutouts() {
             );
 
     // USB-C cable opening. Connector center is from the official ESP32 V2 PCB.
-    usb_center_z = board_top_z + 1.6 + usb_vertical_offset;
-    face_rounded_cutout(
-        "front",
-        board_origin_y + usb_center_y,
-        usb_center_z,
-        usb_opening_width + hole_compensation,
-        usb_opening_height + hole_compensation,
-        usb_opening_radius
-    );
+    if (usb_opening_enabled)
+        face_rounded_cutout(
+            "front",
+            usb_center_u,
+            usb_center_z,
+            usb_inner_width,
+            usb_inner_height,
+            usb_opening_radius
+        );
 
     if (tripod_insert_enabled) {
         translate([tripod_center_x, tripod_center_y, 0]) {
@@ -711,13 +877,18 @@ module lid_cutouts() {
             );
     }
 
-    if (battery_enabled)
-        translate([rocker_center_x, rocker_center_y, -eps])
+    if (battery_enabled) {
+        translate([rocker_lid_center_x, rocker_lid_center_y, -eps])
             centered_rounded_prism(
                 rocker_cutout_size,
                 lid_thickness + lid_lip_depth + 2 * eps,
                 rocker_corner_radius
             );
+        rocker_tab_reliefs(
+            [rocker_lid_center_x, rocker_lid_center_y],
+            rocker_cutout_size
+        );
+    }
 
     if (top_profile == "oled128x64") {
         beveled_oled_window();
@@ -728,6 +899,41 @@ module lid_cutouts() {
     }
 }
 
+// Thin the horizontal top/bottom edges of the upright switch opening where the
+// spring tabs latch. Each full-width land overlaps the rounded opening by its
+// corner radius, then extends outward before tapering to the surrounding lid.
+module rocker_tab_reliefs(center, opening_size) {
+    relief_depth = lid_thickness - rocker_tab_panel_thickness;
+    opening_overlap = rocker_corner_radius;
+    strip = 0.02;
+    for (side = [-1, 1]) {
+        edge_y = center[1] + side * opening_size[1] / 2;
+        translate([
+            center[0] - opening_size[0] / 2,
+            edge_y - (side < 0 ? rocker_tab_land : opening_overlap),
+            rocker_tab_panel_thickness
+        ])
+            cube([opening_size[0], rocker_tab_land + opening_overlap,
+                relief_depth + eps]);
+
+        hull() {
+            translate([
+                center[0] - opening_size[0] / 2,
+                edge_y + side * rocker_tab_land - (side < 0 ? strip : 0),
+                rocker_tab_panel_thickness
+            ])
+                cube([opening_size[0], strip, relief_depth + eps]);
+            translate([
+                center[0] - opening_size[0] / 2,
+                edge_y + side * (rocker_tab_land + rocker_tab_taper_length)
+                    - (side < 0 ? strip : 0),
+                lid_thickness - strip
+            ])
+                cube([opening_size[0], strip, strip + eps]);
+        }
+    }
+}
+
 module lid_artwork_nominal_2d() {
     translate(lid_art_center)
         rotate(lid_art_rotation)
@@ -854,7 +1060,7 @@ module reference_top_feature() {
                 cube([
                     oled_visible_size[0],
                     oled_visible_size[1],
-                    oled_component_height
+                    oled_display_height
                 ]);
         color([0.6, 0.6, 0.6, 0.9])
             for (xy = [
@@ -891,15 +1097,15 @@ module reference_battery_and_switch() {
                     cylinder(h = battery_length, d = battery_diameter);
         color([0.08, 0.08, 0.08, 0.85])
             translate([
-                rocker_center_x - rocker_body_size[0] / 2,
-                rocker_center_y - rocker_body_size[1] / 2,
+                rocker_installed_center_x - rocker_body_size[0] / 2,
+                rocker_installed_center_y - rocker_body_size[1] / 2,
                 body_height + exploded_view - rocker_body_size[2]
             ])
                 cube(rocker_body_size);
         color([0.12, 0.12, 0.12, 0.95])
             translate([
-                rocker_center_x - rocker_cutout_size[0] / 2,
-                rocker_center_y - rocker_cutout_size[1] / 2,
+                rocker_installed_center_x - rocker_cutout_size[0] / 2,
+                rocker_installed_center_y - rocker_cutout_size[1] / 2,
                 body_height + exploded_view + lid_thickness
             ])
                 cube([rocker_cutout_size[0], rocker_cutout_size[1], 2.5]);
@@ -957,7 +1163,7 @@ module switch_coupon() {
     coupon_height = lid_thickness;
     difference() {
         rounded_box([coupon_length, coupon_width, coupon_height], 3);
-        for (i = [0 : len(coupon_steps) - 1])
+        for (i = [0 : len(coupon_steps) - 1]) {
             translate([6 + i * spacing, coupon_width / 2, -eps])
                 centered_rounded_prism(
                     rocker_cutout_size
@@ -965,6 +1171,11 @@ module switch_coupon() {
                     coupon_height + 2 * eps,
                     rocker_corner_radius
                 );
+            rocker_tab_reliefs(
+                [6 + i * spacing, coupon_width / 2],
+                rocker_cutout_size + [coupon_steps[i], coupon_steps[i]]
+            );
+        }
     }
 }
 
@@ -1002,6 +1213,8 @@ module fit_coupon() {
         }
 }
 
+validate_cutout_spacing();
+
 if (part == "assembly")
     assembly();
 else if (part == "body")
diff --git a/cases/attitude-w-battery/README.md b/cases/attitude-w-battery/README.md
index 13b3e51..84b4030 100644
--- a/cases/attitude-w-battery/README.md
+++ b/cases/attitude-w-battery/README.md
@@ -6,7 +6,7 @@ Generated by the Feather Case Wizard.
 - FeatherWings: 1
 - Battery compartment: yes
 - 1/4-20 insert: yes
-- Approximate exterior: 88.6 × 59.1 × 33.2 mm
+- Approximate exterior: 88.6 × 61.1 × 34.4 mm
 - Formats: 3mf
 - Parts: `body`, `lid`
 - Custom cutouts: 0
diff --git a/cases/attitude-w-battery/case.yml b/cases/attitude-w-battery/case.yml
index f7b02d0..846486f 100644
--- a/cases/attitude-w-battery/case.yml
+++ b/cases/attitude-w-battery/case.yml
@@ -3,18 +3,19 @@ schema_version: 1
 name: Attitude w/battery
 slug: attitude-w-battery
 generator:
-  sha256: daeb9015a2bd04a16a75b77b32ee84bca2a9e2a4f4fe16605f3d5dc7e6d53036
+  sha256: 281917098487eeacd19a136ba27752698712e90cb4c03c6525a1ea3167c9ea13
   created_with: feather-case-wizard
 parameters:
   top_profile: generic
   wing_count: 1
-  wing_pitch: 11.0
+  wing_pitch: 12.25
   stack_height_override: 0.0
   generic_component_height: 3.0
   generic_top_gap: 2.0
-  gps_antenna_height: 4.0
+  gps_antenna_height: 6.0
   gps_top_gap: 5.0
   oled_component_height: 2.4
+  oled_display_height: 1.5
   oled_face_gap: 0.8
   button_a: true
   button_b: true
@@ -36,6 +37,7 @@ parameters:
   battery_radial_clearance: 0.6
   battery_end_clearance: 1.0
   battery_partition_thickness: 1.8
+  battery_board_clearance: 3.0
   rocker_cutout_size:
   - 12.9
   - 19.4
@@ -45,6 +47,10 @@ parameters:
   - 21.0
   - 21.0
   rocker_artwork_gap: 2.0
+  rocker_partition_offset: 2.0
+  rocker_tab_panel_thickness: 2.0
+  rocker_tab_land: 2.0
+  rocker_tab_taper_length: 0.6
   tripod_insert_enabled: true
   tripod_insert_length: 5.0
   tripod_insert_hole_diameter: 7.2
@@ -65,13 +71,19 @@ parameters:
   board_bottom_clearance: 5.4
   board_side_clearance: 7.0
   board_rear_clearance: 4.0
-  usb_board_wall_gap: 1.2
+  usb_board_wall_gap: 2.0
   lid_lip_depth: 2.4
   lid_lip_thickness: 1.2
   fit_clearance: 0.35
+  cutout_min_web: 1.2
   hole_compensation: 0.2
   lid_screw_head_diameter: 5.2
   lid_screw_head_height: 2.5
+  usb_opening_enabled: true
+  usb_guide_enabled: true
+  usb_connector_overhang: 2.0
+  usb_guide_wall_thickness: 1.2
+  usb_guide_end_gap: 1.0
   lid_label: ''
   lid_logo_enabled: false
   lid_art_orientation: usb_left
@@ -80,10 +92,10 @@ parameters:
   lid_label_size: 5.0
   lid_label_logo_gap: 2.0
   lid_art_margin: 8.5
-  usb_opening_width: 12.5
-  usb_opening_height: 7.0
+  usb_opening_width: 13.5
+  usb_opening_height: 8.0
   usb_opening_radius: 1.5
-  usb_vertical_offset: 0.0
+  usb_vertical_offset: 0.5
 cutouts: []
 outputs:
   formats:
diff --git a/cases/attitude-w-battery/parameters.json b/cases/attitude-w-battery/parameters.json
index ac4febe..803e336 100644
--- a/cases/attitude-w-battery/parameters.json
+++ b/cases/attitude-w-battery/parameters.json
@@ -3,13 +3,14 @@
     "attitude-w-battery": {
       "top_profile": "\"generic\"",
       "wing_count": "1",
-      "wing_pitch": "11.0",
+      "wing_pitch": "12.25",
       "stack_height_override": "0.0",
       "generic_component_height": "3.0",
       "generic_top_gap": "2.0",
-      "gps_antenna_height": "4.0",
+      "gps_antenna_height": "6.0",
       "gps_top_gap": "5.0",
       "oled_component_height": "2.4",
+      "oled_display_height": "1.5",
       "oled_face_gap": "0.8",
       "button_a": "true",
       "button_b": "true",
@@ -27,10 +28,15 @@
       "battery_radial_clearance": "0.6",
       "battery_end_clearance": "1.0",
       "battery_partition_thickness": "1.8",
+      "battery_board_clearance": "3.0",
       "rocker_cutout_size": "[12.9,19.4]",
       "rocker_corner_radius": "0.8",
       "rocker_body_size": "[15.0,21.0,21.0]",
       "rocker_artwork_gap": "2.0",
+      "rocker_partition_offset": "2.0",
+      "rocker_tab_panel_thickness": "2.0",
+      "rocker_tab_land": "2.0",
+      "rocker_tab_taper_length": "0.6",
       "tripod_insert_enabled": "true",
       "tripod_insert_length": "5.0",
       "tripod_insert_hole_diameter": "7.2",
@@ -51,13 +57,19 @@
       "board_bottom_clearance": "5.4",
       "board_side_clearance": "7.0",
       "board_rear_clearance": "4.0",
-      "usb_board_wall_gap": "1.2",
+      "usb_board_wall_gap": "2.0",
       "lid_lip_depth": "2.4",
       "lid_lip_thickness": "1.2",
       "fit_clearance": "0.35",
+      "cutout_min_web": "1.2",
       "hole_compensation": "0.2",
       "lid_screw_head_diameter": "5.2",
       "lid_screw_head_height": "2.5",
+      "usb_opening_enabled": "true",
+      "usb_guide_enabled": "true",
+      "usb_connector_overhang": "2.0",
+      "usb_guide_wall_thickness": "1.2",
+      "usb_guide_end_gap": "1.0",
       "lid_label": "\"\"",
       "lid_logo_enabled": "false",
       "lid_art_orientation": "\"usb_left\"",
@@ -66,10 +78,10 @@
       "lid_label_size": "5.0",
       "lid_label_logo_gap": "2.0",
       "lid_art_margin": "8.5",
-      "usb_opening_width": "12.5",
-      "usb_opening_height": "7.0",
+      "usb_opening_width": "13.5",
+      "usb_opening_height": "8.0",
       "usb_opening_radius": "1.5",
-      "usb_vertical_offset": "0.0"
+      "usb_vertical_offset": "0.5"
     }
   },
   "fileFormatVersion": "1"
diff --git a/cases/attitude-w-battery/source/feather_case.scad b/cases/attitude-w-battery/source/feather_case.scad
index 3a33f30..92aab0f 100644
--- a/cases/attitude-w-battery/source/feather_case.scad
+++ b/cases/attitude-w-battery/source/feather_case.scad
@@ -19,13 +19,14 @@ show_references = true;
 /* [Stack] */
 top_profile = "generic"; // [generic,gps,oled128x64]
 wing_count = 1; // [1:1:8]
-wing_pitch = 11; // [7:0.1:16]
+wing_pitch = 12.25; // [7:0.1:16]
 stack_height_override = 0; // [0:0.1:100]
 generic_component_height = 3; // [0:0.1:30]
 generic_top_gap = 2; // [0.5:0.1:10]
-gps_antenna_height = 4;
+gps_antenna_height = 6;
 gps_top_gap = 5;
 oled_component_height = 2.4;
+oled_display_height = 1.5;
 oled_face_gap = 0.8;
 
 /* [OLED controls] */
@@ -47,10 +48,15 @@ battery_diameter = 18;
 battery_radial_clearance = 0.6;
 battery_end_clearance = 1;
 battery_partition_thickness = 1.8;
+battery_board_clearance = 3;
 rocker_cutout_size = [12.9, 19.4];
 rocker_corner_radius = 0.8;
 rocker_body_size = [15, 21, 21];
 rocker_artwork_gap = 2;
+rocker_partition_offset = 2;
+rocker_tab_panel_thickness = 2;
+rocker_tab_land = 2;
+rocker_tab_taper_length = 0.6;
 
 /* [Tripod mount] */
 tripod_insert_enabled = false;
@@ -77,10 +83,11 @@ corner_radius = 4;
 board_bottom_clearance = 5.4;
 board_side_clearance = 7;
 board_rear_clearance = 4;
-usb_board_wall_gap = 1.2;
+usb_board_wall_gap = 2;
 lid_lip_depth = 2.4;
 lid_lip_thickness = 1.2;
 fit_clearance = 0.35;
+cutout_min_web = 1.2;
 hole_compensation = 0.2;
 lid_screw_head_diameter = 5.2;
 lid_screw_head_height = 2.5;
@@ -97,10 +104,15 @@ lid_art_margin = 8.5;
 logo_file = "assets/NME-fixed.svg";
 
 /* [USB-C opening] */
-usb_opening_width = 12.5;
-usb_opening_height = 7;
+usb_opening_enabled = true;
+usb_guide_enabled = true;
+usb_connector_overhang = 2;
+usb_guide_wall_thickness = 1.2;
+usb_guide_end_gap = 1;
+usb_opening_width = 13.5;
+usb_opening_height = 8;
 usb_opening_radius = 1.5;
-usb_vertical_offset = 0;
+usb_vertical_offset = 0.5;
 
 /* [Custom wall cutouts] */
 // Entry format: [face, shape, u, z, width, height, radius]
@@ -156,6 +168,20 @@ board_origin_y = wall_thickness + board_side_clearance
     + combined_tripod_board_gutter;
 board_bottom_z = effective_floor + effective_board_clearance;
 board_top_z = board_bottom_z + board_thickness;
+usb_center_u = board_origin_y + usb_center_y;
+usb_center_z = board_top_z + 1.6 + usb_vertical_offset;
+usb_inner_width = usb_opening_width + hole_compensation;
+usb_inner_height = usb_opening_height + hole_compensation;
+usb_guide_length = max(
+    0,
+    usb_board_wall_gap - usb_connector_overhang - usb_guide_end_gap
+);
+usb_guide_active = usb_opening_enabled && usb_guide_enabled
+    && usb_guide_length > 0;
+usb_reserved_width = usb_inner_width
+    + (usb_guide_active ? 2 * usb_guide_wall_thickness : 0);
+usb_reserved_height = usb_inner_height
+    + (usb_guide_active ? 2 * usb_guide_wall_thickness : 0);
 
 computed_top_pcb_z = board_top_z + wing_count * wing_pitch;
 top_pcb_z = stack_height_override > 0
@@ -170,7 +196,7 @@ profile_top_gap =
     top_profile == "oled128x64" ? oled_face_gap :
     generic_top_gap;
 
-partition_y = board_origin_y + feather_width + 1;
+partition_y = board_origin_y + feather_width + battery_board_clearance;
 battery_center_y = partition_y + battery_partition_thickness
     + battery_radial_clearance + battery_diameter / 2;
 battery_start_x = front_lid_boss_center + lid_boss_r
@@ -191,10 +217,14 @@ case_width_battery = battery_center_y + battery_diameter / 2
 case_width = battery_enabled ? max(case_width_plain, case_width_battery)
     : case_width_plain;
 
-rocker_center_x = case_length - wall_thickness - fit_clearance
+rocker_installed_center_x = case_length - wall_thickness - fit_clearance
     - lid_lip_thickness - fit_clearance - rocker_body_size[0] / 2;
-rocker_center_y = front_lid_boss_center + lid_boss_r + fit_clearance
-    + rocker_body_size[1] / 2;
+rocker_installed_center_y = front_lid_boss_center + lid_boss_r + fit_clearance
+    + rocker_body_size[1] / 2 + rocker_partition_offset;
+// The printable lid is flipped across Y when installed, so its local cutout
+// coordinate must be mirrored from the assembled switch location.
+rocker_lid_center_x = rocker_installed_center_x;
+rocker_lid_center_y = case_width - rocker_installed_center_y;
 
 lid_artwork_enabled = lid_label != "" || lid_logo_enabled;
 lid_art_rotation =
@@ -202,7 +232,7 @@ lid_art_rotation =
     lid_art_orientation == "usb_front" ? 90 :
     lid_art_orientation == "usb_right" ? 180 : 270;
 lid_art_safe_max_x = battery_enabled
-    ? rocker_center_x - rocker_cutout_size[0] / 2 - rocker_artwork_gap
+    ? rocker_lid_center_x - rocker_cutout_size[0] / 2 - rocker_artwork_gap
     : case_length - lid_art_margin;
 lid_art_physical_size = [
     lid_art_safe_max_x - lid_art_margin,
@@ -273,6 +303,34 @@ lid_boss_xy = [
         case_width - wall_thickness - lid_boss_r + lid_boss_wall_overlap
     ]
 ];
+rocker_boss_clearance = min([
+    for (p = lid_boss_xy)
+        sqrt(
+            pow(max(
+                abs(p[0] - rocker_installed_center_x)
+                    - rocker_body_size[0] / 2,
+                0
+            ), 2)
+            + pow(max(
+                abs(p[1] - rocker_installed_center_y)
+                    - rocker_body_size[1] / 2,
+                0
+            ), 2)
+        ) - lid_boss_r
+]);
+rocker_relief_half_size = [
+    rocker_cutout_size[0] / 2,
+    rocker_cutout_size[1] / 2 + rocker_tab_land + rocker_tab_taper_length
+];
+rocker_relief_boss_clearance = min([
+    for (p = lid_boss_xy)
+        sqrt(
+            pow(max(abs(p[0] - rocker_lid_center_x)
+                - rocker_relief_half_size[0], 0), 2)
+            + pow(max(abs(p[1] - rocker_lid_center_y)
+                - rocker_relief_half_size[1], 0), 2)
+        ) - lid_boss_r
+]);
 
 assert(wing_count >= 1, "wing_count must be at least one");
 assert(top_profile == "generic" || top_profile == "gps"
@@ -280,6 +338,14 @@ assert(top_profile == "generic" || top_profile == "gps"
 assert(wall_thickness >= 1.2, "wall_thickness is too small for 0.6 mm FDM");
 assert(battery_partition_thickness >= 1.2,
     "battery_partition_thickness is too small for 0.6 mm FDM");
+assert(battery_board_clearance > 0,
+    "battery_board_clearance must be positive");
+assert(rocker_tab_panel_thickness >= 1.2,
+    "rocker tab panel needs at least two 0.6 mm lines");
+assert(rocker_tab_panel_thickness < lid_thickness,
+    "rocker tab panel must be thinner than the lid");
+assert(rocker_tab_land > 0 && rocker_tab_taper_length > 0,
+    "rocker tab relief land and taper must be positive");
 assert(lid_lip_thickness >= 1.2, "lid lip needs at least two 0.6 mm lines");
 assert(lid_art_orientation == "usb_left"
     || lid_art_orientation == "usb_front"
@@ -302,6 +368,15 @@ assert(m25_insert_outer_diameter >= m25_insert_hole_diameter,
 assert(!tripod_insert_enabled
     || tripod_boss_diameter > tripod_insert_hole_diameter + 3,
     "Tripod insert boss does not have enough radial material");
+assert(usb_opening_enabled || !usb_guide_enabled,
+    "USB guide requires the USB opening");
+assert(!usb_opening_enabled
+    || usb_center_z - usb_reserved_height / 2 >= effective_floor,
+    "USB opening or guide intersects the case floor");
+assert(!usb_opening_enabled
+    || usb_center_z + usb_reserved_height / 2
+        <= body_height - lid_lip_depth,
+    "USB opening or guide intersects the lid lip");
 assert(!tripod_insert_enabled
     || tripod_insert_outer_diameter >= tripod_insert_hole_diameter,
     "Tripod insert entry must not be smaller than its pilot");
@@ -311,18 +386,73 @@ assert(!battery_enabled || !tripod_insert_enabled
     || tripod_partition_clearance >= 1,
     "Tripod insert entry is too close to the battery partition");
 assert(!battery_enabled
-    || rocker_center_x - rocker_body_size[0] / 2
+    || rocker_installed_center_x - rocker_body_size[0] / 2
         >= board_origin_x + feather_length + fit_clearance,
     "Rocker body overlaps the Feather PCB");
 assert(!battery_enabled
-    || rocker_center_y + rocker_body_size[1] / 2
+    || rocker_installed_center_y + rocker_body_size[1] / 2
         <= partition_y - fit_clearance,
     "Rocker body overlaps the battery partition");
+assert(!battery_enabled
+    || rocker_installed_center_x - rocker_body_size[0] / 2
+        >= wall_thickness + lid_lip_thickness + fit_clearance,
+    "Rocker body overlaps the front lid lip");
+assert(!battery_enabled
+    || rocker_installed_center_x + rocker_body_size[0] / 2
+        <= case_length - wall_thickness - lid_lip_thickness - fit_clearance,
+    "Rocker body overlaps the rear lid lip");
+assert(!battery_enabled
+    || rocker_installed_center_y - rocker_body_size[1] / 2
+        >= wall_thickness + lid_lip_thickness + fit_clearance,
+    "Rocker body overlaps the Feather-side lid lip");
+assert(!battery_enabled || rocker_boss_clearance >= fit_clearance - eps,
+    "Rocker body overlaps a lid boss");
+assert(!battery_enabled
+    || rocker_relief_boss_clearance >= fit_clearance - eps,
+    "Rocker tab relief overlaps a lid boss scallop");
+assert(!battery_enabled
+    || abs(
+        case_width - rocker_lid_center_y - rocker_installed_center_y
+    ) < eps,
+    "Rocker lid cutout does not mirror to the installed switch location");
 assert(!battery_enabled
     || body_height - rocker_body_size[2] >= effective_floor,
     "Rocker body intersects the case floor");
 
 function clamp(v, lo, hi) = min(max(v, lo), hi);
+function cutout_height(entry) = len(entry) > 5 ? entry[5] : entry[4];
+function cutouts_separated(first, second, web) =
+    abs(first[2] - second[2])
+        >= (first[4] + second[4]) / 2 + web
+    || abs(first[3] - second[3])
+        >= (cutout_height(first) + cutout_height(second)) / 2 + web;
+function cutout_clear_of_usb(entry, web) =
+    abs(entry[2] - usb_center_u)
+        >= (entry[4] + usb_reserved_width) / 2 + web
+    || abs(entry[3] - usb_center_z)
+        >= (cutout_height(entry) + usb_reserved_height) / 2 + web;
+
+module validate_cutout_spacing() {
+    if (len(extra_cutouts) > 1)
+        for (first = [0 : len(extra_cutouts) - 2],
+             second = [first + 1 : len(extra_cutouts) - 1])
+            if (extra_cutouts[first][0] == extra_cutouts[second][0])
+                assert(
+                    cutouts_separated(
+                        extra_cutouts[first],
+                        extra_cutouts[second],
+                        cutout_min_web
+                    ),
+                    "Custom cutouts are too close on the same wall"
+                );
+    if (usb_opening_enabled)
+        for (entry = extra_cutouts)
+            if (entry[0] == "front")
+                assert(
+                    cutout_clear_of_usb(entry, cutout_min_web),
+                    "Front cutout is too close to the USB opening or guide"
+                );
+}
 
 module rounded_rect_2d(size, radius) {
     r = clamp(radius, 0.01, min(size[0], size[1]) / 2 - 0.01);
@@ -406,6 +536,40 @@ module face_circle_cutout(face, u, z, diameter) {
             rotate([-90, 0, 0]) cylinder(h = depth, d = diameter);
 }
 
+module x_rounded_prism(x, length, u, z, width, height, radius) {
+    r = clamp(radius, 0.01, min(width, height) / 2 - 0.01);
+    hull()
+        for (yy = [u - width / 2 + r, u + width / 2 - r],
+             zz = [z - height / 2 + r, z + height / 2 - r])
+            translate([x, yy, zz])
+                rotate([0, 90, 0]) cylinder(h = length, r = r);
+}
+
+module usb_guide_shell() {
+    outer_width = usb_inner_width + 2 * usb_guide_wall_thickness;
+    outer_height = usb_inner_height + 2 * usb_guide_wall_thickness;
+    difference() {
+        x_rounded_prism(
+            wall_thickness - eps,
+            usb_guide_length + 2 * eps,
+            usb_center_u,
+            usb_center_z,
+            outer_width,
+            outer_height,
+            usb_opening_radius + usb_guide_wall_thickness
+        );
+        x_rounded_prism(
+            wall_thickness - 2 * eps,
+            usb_guide_length + 4 * eps,
+            usb_center_u,
+            usb_center_z,
+            usb_inner_width,
+            usb_inner_height,
+            usb_opening_radius
+        );
+    }
+}
+
 module custom_wall_cutout(entry) {
     face = entry[0];
     shape = entry[1];
@@ -554,6 +718,8 @@ module body_positive() {
         if (tripod_insert_enabled)
             translate([tripod_center_x, tripod_center_y, 0])
                 cylinder(h = effective_floor, d = tripod_boss_diameter);
+        if (usb_guide_active)
+            usb_guide_shell();
     }
 }
 
@@ -579,15 +745,15 @@ module body_cutouts() {
             );
 
     // USB-C cable opening. Connector center is from the official ESP32 V2 PCB.
-    usb_center_z = board_top_z + 1.6 + usb_vertical_offset;
-    face_rounded_cutout(
-        "front",
-        board_origin_y + usb_center_y,
-        usb_center_z,
-        usb_opening_width + hole_compensation,
-        usb_opening_height + hole_compensation,
-        usb_opening_radius
-    );
+    if (usb_opening_enabled)
+        face_rounded_cutout(
+            "front",
+            usb_center_u,
+            usb_center_z,
+            usb_inner_width,
+            usb_inner_height,
+            usb_opening_radius
+        );
 
     if (tripod_insert_enabled) {
         translate([tripod_center_x, tripod_center_y, 0]) {
@@ -711,13 +877,18 @@ module lid_cutouts() {
             );
     }
 
-    if (battery_enabled)
-        translate([rocker_center_x, rocker_center_y, -eps])
+    if (battery_enabled) {
+        translate([rocker_lid_center_x, rocker_lid_center_y, -eps])
             centered_rounded_prism(
                 rocker_cutout_size,
                 lid_thickness + lid_lip_depth + 2 * eps,
                 rocker_corner_radius
             );
+        rocker_tab_reliefs(
+            [rocker_lid_center_x, rocker_lid_center_y],
+            rocker_cutout_size
+        );
+    }
 
     if (top_profile == "oled128x64") {
         beveled_oled_window();
@@ -728,6 +899,41 @@ module lid_cutouts() {
     }
 }
 
+// Thin the horizontal top/bottom edges of the upright switch opening where the
+// spring tabs latch. Each full-width land overlaps the rounded opening by its
+// corner radius, then extends outward before tapering to the surrounding lid.
+module rocker_tab_reliefs(center, opening_size) {
+    relief_depth = lid_thickness - rocker_tab_panel_thickness;
+    opening_overlap = rocker_corner_radius;
+    strip = 0.02;
+    for (side = [-1, 1]) {
+        edge_y = center[1] + side * opening_size[1] / 2;
+        translate([
+            center[0] - opening_size[0] / 2,
+            edge_y - (side < 0 ? rocker_tab_land : opening_overlap),
+            rocker_tab_panel_thickness
+        ])
+            cube([opening_size[0], rocker_tab_land + opening_overlap,
+                relief_depth + eps]);
+
+        hull() {
+            translate([
+                center[0] - opening_size[0] / 2,
+                edge_y + side * rocker_tab_land - (side < 0 ? strip : 0),
+                rocker_tab_panel_thickness
+            ])
+                cube([opening_size[0], strip, relief_depth + eps]);
+            translate([
+                center[0] - opening_size[0] / 2,
+                edge_y + side * (rocker_tab_land + rocker_tab_taper_length)
+                    - (side < 0 ? strip : 0),
+                lid_thickness - strip
+            ])
+                cube([opening_size[0], strip, strip + eps]);
+        }
+    }
+}
+
 module lid_artwork_nominal_2d() {
     translate(lid_art_center)
         rotate(lid_art_rotation)
@@ -854,7 +1060,7 @@ module reference_top_feature() {
                 cube([
                     oled_visible_size[0],
                     oled_visible_size[1],
-                    oled_component_height
+                    oled_display_height
                 ]);
         color([0.6, 0.6, 0.6, 0.9])
             for (xy = [
@@ -891,15 +1097,15 @@ module reference_battery_and_switch() {
                     cylinder(h = battery_length, d = battery_diameter);
         color([0.08, 0.08, 0.08, 0.85])
             translate([
-                rocker_center_x - rocker_body_size[0] / 2,
-                rocker_center_y - rocker_body_size[1] / 2,
+                rocker_installed_center_x - rocker_body_size[0] / 2,
+                rocker_installed_center_y - rocker_body_size[1] / 2,
                 body_height + exploded_view - rocker_body_size[2]
             ])
                 cube(rocker_body_size);
         color([0.12, 0.12, 0.12, 0.95])
             translate([
-                rocker_center_x - rocker_cutout_size[0] / 2,
-                rocker_center_y - rocker_cutout_size[1] / 2,
+                rocker_installed_center_x - rocker_cutout_size[0] / 2,
+                rocker_installed_center_y - rocker_cutout_size[1] / 2,
                 body_height + exploded_view + lid_thickness
             ])
                 cube([rocker_cutout_size[0], rocker_cutout_size[1], 2.5]);
@@ -957,7 +1163,7 @@ module switch_coupon() {
     coupon_height = lid_thickness;
     difference() {
         rounded_box([coupon_length, coupon_width, coupon_height], 3);
-        for (i = [0 : len(coupon_steps) - 1])
+        for (i = [0 : len(coupon_steps) - 1]) {
             translate([6 + i * spacing, coupon_width / 2, -eps])
                 centered_rounded_prism(
                     rocker_cutout_size
@@ -965,6 +1171,11 @@ module switch_coupon() {
                     coupon_height + 2 * eps,
                     rocker_corner_radius
                 );
+            rocker_tab_reliefs(
+                [6 + i * spacing, coupon_width / 2],
+                rocker_cutout_size + [coupon_steps[i], coupon_steps[i]]
+            );
+        }
     }
 }
 
@@ -1002,6 +1213,8 @@ module fit_coupon() {
         }
 }
 
+validate_cutout_spacing();
+
 if (part == "assembly")
     assembly();
 else if (part == "body")
diff --git a/cases/gps/README.md b/cases/gps/README.md
index 33d81f0..8ea7e8d 100644
--- a/cases/gps/README.md
+++ b/cases/gps/README.md
@@ -6,7 +6,7 @@ Generated by the Feather Case Wizard.
 - FeatherWings: 1
 - Battery compartment: yes
 - 1/4-20 insert: yes
-- Approximate exterior: 88.6 × 59.1 × 40.4 mm
+- Approximate exterior: 88.6 × 61.1 × 40.4 mm
 - Formats: 3mf
 - Parts: `body`, `lid`, `lid_base`, `lid_accent`, `insert_coupon`, `switch_coupon`, `fit_coupon`
 - Custom cutouts: 0
diff --git a/cases/gps/case.yml b/cases/gps/case.yml
index 94f04e1..9a7cd8f 100644
--- a/cases/gps/case.yml
+++ b/cases/gps/case.yml
@@ -3,7 +3,7 @@ schema_version: 1
 name: GPS
 slug: gps
 generator:
-  sha256: 168dd3c04ca4015b07fe6c0295e7d4bb43969671f5f3552ffab31d8deffc3024
+  sha256: 281917098487eeacd19a136ba27752698712e90cb4c03c6525a1ea3167c9ea13
   created_with: feather-case-wizard
 parameters:
   top_profile: gps
@@ -37,6 +37,7 @@ parameters:
   battery_radial_clearance: 0.6
   battery_end_clearance: 1.0
   battery_partition_thickness: 1.8
+  battery_board_clearance: 3.0
   rocker_cutout_size:
   - 12.9
   - 19.4
@@ -46,6 +47,10 @@ parameters:
   - 21.0
   - 21.0
   rocker_artwork_gap: 2.0
+  rocker_partition_offset: 2.0
+  rocker_tab_panel_thickness: 2.0
+  rocker_tab_land: 2.0
+  rocker_tab_taper_length: 0.6
   tripod_insert_enabled: true
   tripod_insert_length: 5.0
   tripod_insert_hole_diameter: 7.2
@@ -87,10 +92,10 @@ parameters:
   lid_label_size: 5.0
   lid_label_logo_gap: 2.0
   lid_art_margin: 8.5
-  usb_opening_width: 12.5
-  usb_opening_height: 7.0
+  usb_opening_width: 13.5
+  usb_opening_height: 8.0
   usb_opening_radius: 1.5
-  usb_vertical_offset: 0.0
+  usb_vertical_offset: 0.5
 cutouts: []
 outputs:
   formats:
diff --git a/cases/gps/parameters.json b/cases/gps/parameters.json
index 6d275d7..d292717 100644
--- a/cases/gps/parameters.json
+++ b/cases/gps/parameters.json
@@ -28,10 +28,15 @@
       "battery_radial_clearance": "0.6",
       "battery_end_clearance": "1.0",
       "battery_partition_thickness": "1.8",
+      "battery_board_clearance": "3.0",
       "rocker_cutout_size": "[12.9,19.4]",
       "rocker_corner_radius": "0.8",
       "rocker_body_size": "[15.0,21.0,21.0]",
       "rocker_artwork_gap": "2.0",
+      "rocker_partition_offset": "2.0",
+      "rocker_tab_panel_thickness": "2.0",
+      "rocker_tab_land": "2.0",
+      "rocker_tab_taper_length": "0.6",
       "tripod_insert_enabled": "true",
       "tripod_insert_length": "5.0",
       "tripod_insert_hole_diameter": "7.2",
@@ -73,10 +78,10 @@
       "lid_label_size": "5.0",
       "lid_label_logo_gap": "2.0",
       "lid_art_margin": "8.5",
-      "usb_opening_width": "12.5",
-      "usb_opening_height": "7.0",
+      "usb_opening_width": "13.5",
+      "usb_opening_height": "8.0",
       "usb_opening_radius": "1.5",
-      "usb_vertical_offset": "0.0"
+      "usb_vertical_offset": "0.5"
     }
   },
   "fileFormatVersion": "1"
diff --git a/cases/gps/source/feather_case.scad b/cases/gps/source/feather_case.scad
index 7948af5..92aab0f 100644
--- a/cases/gps/source/feather_case.scad
+++ b/cases/gps/source/feather_case.scad
@@ -48,10 +48,15 @@ battery_diameter = 18;
 battery_radial_clearance = 0.6;
 battery_end_clearance = 1;
 battery_partition_thickness = 1.8;
+battery_board_clearance = 3;
 rocker_cutout_size = [12.9, 19.4];
 rocker_corner_radius = 0.8;
 rocker_body_size = [15, 21, 21];
 rocker_artwork_gap = 2;
+rocker_partition_offset = 2;
+rocker_tab_panel_thickness = 2;
+rocker_tab_land = 2;
+rocker_tab_taper_length = 0.6;
 
 /* [Tripod mount] */
 tripod_insert_enabled = false;
@@ -104,10 +109,10 @@ usb_guide_enabled = true;
 usb_connector_overhang = 2;
 usb_guide_wall_thickness = 1.2;
 usb_guide_end_gap = 1;
-usb_opening_width = 12.5;
-usb_opening_height = 7;
+usb_opening_width = 13.5;
+usb_opening_height = 8;
 usb_opening_radius = 1.5;
-usb_vertical_offset = 0;
+usb_vertical_offset = 0.5;
 
 /* [Custom wall cutouts] */
 // Entry format: [face, shape, u, z, width, height, radius]
@@ -191,7 +196,7 @@ profile_top_gap =
     top_profile == "oled128x64" ? oled_face_gap :
     generic_top_gap;
 
-partition_y = board_origin_y + feather_width + 1;
+partition_y = board_origin_y + feather_width + battery_board_clearance;
 battery_center_y = partition_y + battery_partition_thickness
     + battery_radial_clearance + battery_diameter / 2;
 battery_start_x = front_lid_boss_center + lid_boss_r
@@ -212,10 +217,14 @@ case_width_battery = battery_center_y + battery_diameter / 2
 case_width = battery_enabled ? max(case_width_plain, case_width_battery)
     : case_width_plain;
 
-rocker_center_x = case_length - wall_thickness - fit_clearance
+rocker_installed_center_x = case_length - wall_thickness - fit_clearance
     - lid_lip_thickness - fit_clearance - rocker_body_size[0] / 2;
-rocker_center_y = front_lid_boss_center + lid_boss_r + fit_clearance
-    + rocker_body_size[1] / 2;
+rocker_installed_center_y = front_lid_boss_center + lid_boss_r + fit_clearance
+    + rocker_body_size[1] / 2 + rocker_partition_offset;
+// The printable lid is flipped across Y when installed, so its local cutout
+// coordinate must be mirrored from the assembled switch location.
+rocker_lid_center_x = rocker_installed_center_x;
+rocker_lid_center_y = case_width - rocker_installed_center_y;
 
 lid_artwork_enabled = lid_label != "" || lid_logo_enabled;
 lid_art_rotation =
@@ -223,7 +232,7 @@ lid_art_rotation =
     lid_art_orientation == "usb_front" ? 90 :
     lid_art_orientation == "usb_right" ? 180 : 270;
 lid_art_safe_max_x = battery_enabled
-    ? rocker_center_x - rocker_cutout_size[0] / 2 - rocker_artwork_gap
+    ? rocker_lid_center_x - rocker_cutout_size[0] / 2 - rocker_artwork_gap
     : case_length - lid_art_margin;
 lid_art_physical_size = [
     lid_art_safe_max_x - lid_art_margin,
@@ -294,6 +303,34 @@ lid_boss_xy = [
         case_width - wall_thickness - lid_boss_r + lid_boss_wall_overlap
     ]
 ];
+rocker_boss_clearance = min([
+    for (p = lid_boss_xy)
+        sqrt(
+            pow(max(
+                abs(p[0] - rocker_installed_center_x)
+                    - rocker_body_size[0] / 2,
+                0
+            ), 2)
+            + pow(max(
+                abs(p[1] - rocker_installed_center_y)
+                    - rocker_body_size[1] / 2,
+                0
+            ), 2)
+        ) - lid_boss_r
+]);
+rocker_relief_half_size = [
+    rocker_cutout_size[0] / 2,
+    rocker_cutout_size[1] / 2 + rocker_tab_land + rocker_tab_taper_length
+];
+rocker_relief_boss_clearance = min([
+    for (p = lid_boss_xy)
+        sqrt(
+            pow(max(abs(p[0] - rocker_lid_center_x)
+                - rocker_relief_half_size[0], 0), 2)
+            + pow(max(abs(p[1] - rocker_lid_center_y)
+                - rocker_relief_half_size[1], 0), 2)
+        ) - lid_boss_r
+]);
 
 assert(wing_count >= 1, "wing_count must be at least one");
 assert(top_profile == "generic" || top_profile == "gps"
@@ -301,6 +338,14 @@ assert(top_profile == "generic" || top_profile == "gps"
 assert(wall_thickness >= 1.2, "wall_thickness is too small for 0.6 mm FDM");
 assert(battery_partition_thickness >= 1.2,
     "battery_partition_thickness is too small for 0.6 mm FDM");
+assert(battery_board_clearance > 0,
+    "battery_board_clearance must be positive");
+assert(rocker_tab_panel_thickness >= 1.2,
+    "rocker tab panel needs at least two 0.6 mm lines");
+assert(rocker_tab_panel_thickness < lid_thickness,
+    "rocker tab panel must be thinner than the lid");
+assert(rocker_tab_land > 0 && rocker_tab_taper_length > 0,
+    "rocker tab relief land and taper must be positive");
 assert(lid_lip_thickness >= 1.2, "lid lip needs at least two 0.6 mm lines");
 assert(lid_art_orientation == "usb_left"
     || lid_art_orientation == "usb_front"
@@ -325,6 +370,13 @@ assert(!tripod_insert_enabled
     "Tripod insert boss does not have enough radial material");
 assert(usb_opening_enabled || !usb_guide_enabled,
     "USB guide requires the USB opening");
+assert(!usb_opening_enabled
+    || usb_center_z - usb_reserved_height / 2 >= effective_floor,
+    "USB opening or guide intersects the case floor");
+assert(!usb_opening_enabled
+    || usb_center_z + usb_reserved_height / 2
+        <= body_height - lid_lip_depth,
+    "USB opening or guide intersects the lid lip");
 assert(!tripod_insert_enabled
     || tripod_insert_outer_diameter >= tripod_insert_hole_diameter,
     "Tripod insert entry must not be smaller than its pilot");
@@ -334,13 +386,35 @@ assert(!battery_enabled || !tripod_insert_enabled
     || tripod_partition_clearance >= 1,
     "Tripod insert entry is too close to the battery partition");
 assert(!battery_enabled
-    || rocker_center_x - rocker_body_size[0] / 2
+    || rocker_installed_center_x - rocker_body_size[0] / 2
         >= board_origin_x + feather_length + fit_clearance,
     "Rocker body overlaps the Feather PCB");
 assert(!battery_enabled
-    || rocker_center_y + rocker_body_size[1] / 2
+    || rocker_installed_center_y + rocker_body_size[1] / 2
         <= partition_y - fit_clearance,
     "Rocker body overlaps the battery partition");
+assert(!battery_enabled
+    || rocker_installed_center_x - rocker_body_size[0] / 2
+        >= wall_thickness + lid_lip_thickness + fit_clearance,
+    "Rocker body overlaps the front lid lip");
+assert(!battery_enabled
+    || rocker_installed_center_x + rocker_body_size[0] / 2
+        <= case_length - wall_thickness - lid_lip_thickness - fit_clearance,
+    "Rocker body overlaps the rear lid lip");
+assert(!battery_enabled
+    || rocker_installed_center_y - rocker_body_size[1] / 2
+        >= wall_thickness + lid_lip_thickness + fit_clearance,
+    "Rocker body overlaps the Feather-side lid lip");
+assert(!battery_enabled || rocker_boss_clearance >= fit_clearance - eps,
+    "Rocker body overlaps a lid boss");
+assert(!battery_enabled
+    || rocker_relief_boss_clearance >= fit_clearance - eps,
+    "Rocker tab relief overlaps a lid boss scallop");
+assert(!battery_enabled
+    || abs(
+        case_width - rocker_lid_center_y - rocker_installed_center_y
+    ) < eps,
+    "Rocker lid cutout does not mirror to the installed switch location");
 assert(!battery_enabled
     || body_height - rocker_body_size[2] >= effective_floor,
     "Rocker body intersects the case floor");
@@ -803,13 +877,18 @@ module lid_cutouts() {
             );
     }
 
-    if (battery_enabled)
-        translate([rocker_center_x, rocker_center_y, -eps])
+    if (battery_enabled) {
+        translate([rocker_lid_center_x, rocker_lid_center_y, -eps])
             centered_rounded_prism(
                 rocker_cutout_size,
                 lid_thickness + lid_lip_depth + 2 * eps,
                 rocker_corner_radius
             );
+        rocker_tab_reliefs(
+            [rocker_lid_center_x, rocker_lid_center_y],
+            rocker_cutout_size
+        );
+    }
 
     if (top_profile == "oled128x64") {
         beveled_oled_window();
@@ -820,6 +899,41 @@ module lid_cutouts() {
     }
 }
 
+// Thin the horizontal top/bottom edges of the upright switch opening where the
+// spring tabs latch. Each full-width land overlaps the rounded opening by its
+// corner radius, then extends outward before tapering to the surrounding lid.
+module rocker_tab_reliefs(center, opening_size) {
+    relief_depth = lid_thickness - rocker_tab_panel_thickness;
+    opening_overlap = rocker_corner_radius;
+    strip = 0.02;
+    for (side = [-1, 1]) {
+        edge_y = center[1] + side * opening_size[1] / 2;
+        translate([
+            center[0] - opening_size[0] / 2,
+            edge_y - (side < 0 ? rocker_tab_land : opening_overlap),
+            rocker_tab_panel_thickness
+        ])
+            cube([opening_size[0], rocker_tab_land + opening_overlap,
+                relief_depth + eps]);
+
+        hull() {
+            translate([
+                center[0] - opening_size[0] / 2,
+                edge_y + side * rocker_tab_land - (side < 0 ? strip : 0),
+                rocker_tab_panel_thickness
+            ])
+                cube([opening_size[0], strip, relief_depth + eps]);
+            translate([
+                center[0] - opening_size[0] / 2,
+                edge_y + side * (rocker_tab_land + rocker_tab_taper_length)
+                    - (side < 0 ? strip : 0),
+                lid_thickness - strip
+            ])
+                cube([opening_size[0], strip, strip + eps]);
+        }
+    }
+}
+
 module lid_artwork_nominal_2d() {
     translate(lid_art_center)
         rotate(lid_art_rotation)
@@ -983,15 +1097,15 @@ module reference_battery_and_switch() {
                     cylinder(h = battery_length, d = battery_diameter);
         color([0.08, 0.08, 0.08, 0.85])
             translate([
-                rocker_center_x - rocker_body_size[0] / 2,
-                rocker_center_y - rocker_body_size[1] / 2,
+                rocker_installed_center_x - rocker_body_size[0] / 2,
+                rocker_installed_center_y - rocker_body_size[1] / 2,
                 body_height + exploded_view - rocker_body_size[2]
             ])
                 cube(rocker_body_size);
         color([0.12, 0.12, 0.12, 0.95])
             translate([
-                rocker_center_x - rocker_cutout_size[0] / 2,
-                rocker_center_y - rocker_cutout_size[1] / 2,
+                rocker_installed_center_x - rocker_cutout_size[0] / 2,
+                rocker_installed_center_y - rocker_cutout_size[1] / 2,
                 body_height + exploded_view + lid_thickness
             ])
                 cube([rocker_cutout_size[0], rocker_cutout_size[1], 2.5]);
@@ -1049,7 +1163,7 @@ module switch_coupon() {
     coupon_height = lid_thickness;
     difference() {
         rounded_box([coupon_length, coupon_width, coupon_height], 3);
-        for (i = [0 : len(coupon_steps) - 1])
+        for (i = [0 : len(coupon_steps) - 1]) {
             translate([6 + i * spacing, coupon_width / 2, -eps])
                 centered_rounded_prism(
                     rocker_cutout_size
@@ -1057,6 +1171,11 @@ module switch_coupon() {
                     coupon_height + 2 * eps,
                     rocker_corner_radius
                 );
+            rocker_tab_reliefs(
+                [6 + i * spacing, coupon_width / 2],
+                rocker_cutout_size + [coupon_steps[i], coupon_steps[i]]
+            );
+        }
     }
 }
 
diff --git a/cases/pan-tilt-head/README.md b/cases/pan-tilt-head/README.md
deleted file mode 100644
index a486bfb..0000000
--- a/cases/pan-tilt-head/README.md
+++ /dev/null
@@ -1,25 +0,0 @@
-# Pan/Tilt Head
-
-Generated by the Feather Case Wizard.
-
-- Top profile: `oled128x64`
-- FeatherWings: 3
-- Battery compartment: no
-- 1/4-20 insert: yes
-- Approximate exterior: 95.6 × 41.7 × 59.8 mm
-- Formats: 3mf
-- Parts: `body`, `lid`, `buttons`
-- Custom cutouts: 4
-
-Run `ruby build.rb` in this directory to regenerate exports and previews.
-OpenSCAD and Blender must be installed. Set `OPENSCAD` or `BLENDER` to
-override their executable paths.
-
-To open the saved Customizer values manually:
-
-```bash
-openscad -p parameters.json -P pan-tilt-head source/feather_case.scad
-```
-
-The 3MF files contain portable geometry only. Choose printer, filament,
-plate, and slicing settings in Bambu Studio.
diff --git a/cases/pan-tilt-head/build.rb b/cases/pan-tilt-head/build.rb
deleted file mode 100755
index 3deb8ab..0000000
--- a/cases/pan-tilt-head/build.rb
+++ /dev/null
@@ -1,123 +0,0 @@
-#!/usr/bin/env ruby
-# frozen_string_literal: true
-
-require "fileutils"
-require "json"
-require "open3"
-require "pathname"
-require "tmpdir"
-require "yaml"
-
-ROOT = Pathname(__dir__).expand_path
-
-def executable(env_name, command)
-  override = ENV[env_name]
-  return File.expand_path(override) if override && File.executable?(override)
-
-  ENV.fetch("PATH", "").split(File::PATH_SEPARATOR).each do |directory|
-    candidate = File.join(directory, command)
-    return candidate if File.file?(candidate) && File.executable?(candidate)
-  end
-  nil
-end
-
-def literal(value)
-  case value
-  when String then JSON.generate(value)
-  when TrueClass then "true"
-  when FalseClass then "false"
-  when Numeric then value.to_s
-  when Array then "[#{value.map { |item| literal(item) }.join(",")}]"
-  else raise "Cannot convert #{value.inspect} to OpenSCAD"
-  end
-end
-
-def run!(*command, env: {})
-  stdout, stderr, status = Open3.capture3(env, *command)
-  return if status.success?
-
-  warn [stdout, stderr].reject(&:empty?).join("\n")
-  raise "Command failed (#{status.exitstatus}): #{command.first}"
-end
-
-config = YAML.safe_load_file(ROOT.join("case.yml"), permitted_classes: [],
-                             permitted_symbols: [], aliases: false)
-openscad = executable("OPENSCAD", "openscad")
-blender = executable("BLENDER", "blender")
-abort "OpenSCAD not found; install it or set OPENSCAD" unless openscad
-abort "Blender not found; install it or set BLENDER" unless blender
-
-parameters = config.fetch("parameters").merge(
-  "extra_cutouts" => config.fetch("resolved").fetch("extra_cutouts")
-)
-parts = %w[body lid] + config.fetch("outputs").fetch("coupons")
-buttons = %w[button_a button_b button_c button_reset]
-if parameters["top_profile"] == "oled128x64" &&
-   buttons.any? { |name| parameters[name] }
-  parts << "buttons"
-end
-
-stage = Pathname(Dir.mktmpdir(".rebuild-", ROOT.to_s))
-begin
-  exports = stage.join("exports")
-  previews = stage.join("previews")
-  scratch = stage.join("meshes")
-  FileUtils.mkdir_p([exports, previews, scratch])
-  model = ROOT.join("source/feather_case.scad")
-  renderer = ROOT.join("source/render_stl_previews.py")
-
-  export = lambda do |output, part, overrides = {}|
-    values = parameters.merge(overrides).merge("part" => part)
-    command = [openscad, "-o", output.to_s]
-    values.each { |name, value| command.concat(["-D", "#{name}=#{literal(value)}"]) }
-    run!(*command, model.to_s)
-  end
-
-  config.fetch("outputs").fetch("formats").each do |format|
-    directory = exports.join(format)
-    FileUtils.mkdir_p(directory)
-    parts.each do |part|
-      puts "Exporting #{part}.#{format}…"
-      export.call(directory.join("#{part}.#{format}"), part)
-    end
-  end
-
-  assembly = scratch.join("assembly.stl")
-  puts "Preparing assembly preview…"
-  export.call(assembly, "assembly",
-              "exploded_view" => config.fetch("outputs").fetch("assembly_exploded_view"),
-              "show_references" => false)
-  render_env = {"DISPLAY" => nil, "WAYLAND_DISPLAY" => nil}
-  run!(blender, "--background", "-noaudio", "--python", renderer.to_s, "--",
-       assembly.to_s, previews.to_s, "assembly", env: render_env)
-  parts.each do |part|
-    puts "Rendering #{part} preview…"
-    mesh = scratch.join("#{part}.stl")
-    export.call(mesh, part) unless mesh.file?
-    run!(blender, "--background", "-noaudio", "--python", renderer.to_s, "--",
-         mesh.to_s, previews.to_s, part, "iso", env: render_env)
-  end
-
-  backup = ROOT.join(".build-old-#{Process.pid}")
-  FileUtils.mkdir_p(backup)
-  %w[exports previews].each do |name|
-    current = ROOT.join(name)
-    FileUtils.mv(current, backup.join(name)) if current.exist?
-  end
-  begin
-    FileUtils.mv(exports, ROOT.join("exports"))
-    FileUtils.mv(previews, ROOT.join("previews"))
-    FileUtils.rm_rf(backup)
-  rescue StandardError
-    FileUtils.rm_rf(ROOT.join("exports"))
-    FileUtils.rm_rf(ROOT.join("previews"))
-    %w[exports previews].each do |name|
-      saved = backup.join(name)
-      FileUtils.mv(saved, ROOT.join(name)) if saved.exist?
-    end
-    raise
-  end
-  puts "Rebuilt #{ROOT}"
-ensure
-  FileUtils.rm_rf(stage)
-end
diff --git a/cases/pan-tilt-head/case.yml b/cases/pan-tilt-head/case.yml
deleted file mode 100644
index 5ed9bea..0000000
--- a/cases/pan-tilt-head/case.yml
+++ /dev/null
@@ -1,148 +0,0 @@
----
-schema_version: 1
-name: Pan/Tilt Head
-slug: pan-tilt-head
-generator:
-  sha256: 965260d4d402fd8894f30aa863224e2c9b42dc61a1496f01e2f00b509f9624db
-  created_with: feather-case-wizard
-parameters:
-  top_profile: oled128x64
-  wing_count: 3
-  wing_pitch: 12.25
-  stack_height_override: 38.0
-  generic_component_height: 3.0
-  generic_top_gap: 2.0
-  gps_antenna_height: 6.0
-  gps_top_gap: 5.0
-  oled_component_height: 2.4
-  oled_display_height: 1.5
-  oled_face_gap: 0.8
-  button_a: true
-  button_b: true
-  button_c: true
-  button_reset: false
-  button_projection: 1.5
-  button_cap_size:
-  - 5.0
-  - 3.2
-  button_flange_size:
-  - 6.6
-  - 3.6
-  button_flange_thickness: 0.9
-  button_travel: 0.5
-  button_contact_extension: 0.7
-  battery_enabled: false
-  battery_length: 69.0
-  battery_diameter: 18.0
-  battery_radial_clearance: 0.6
-  battery_end_clearance: 1.0
-  switch_hole_diameter: 12.0
-  switch_hole_compensation: 0.3
-  switch_cap_diameter: 8.0
-  switch_flange_diameter: 16.2
-  switch_body_length: 24.0
-  switch_body_diameter: 12.0
-  switch_wire_allowance: 3.0
-  tripod_insert_enabled: true
-  tripod_insert_length: 6.4
-  tripod_insert_hole_diameter: 8.8
-  tripod_thread_clearance_diameter: 6.8
-  tripod_boss_diameter: 14.0
-  m25_insert_length: 4.0
-  m25_insert_hole_diameter: 3.7
-  m25_screw_clearance: 2.8
-  m25_boss_diameter: 7.0
-  insert_entry_chamfer: 0.6
-  insert_melt_relief: 0.8
-  wall_thickness: 2.4
-  floor_thickness: 2.4
-  lid_thickness: 3.2
-  corner_radius: 4.0
-  board_bottom_clearance: 5.4
-  board_side_clearance: 7.0
-  board_rear_clearance: 20.0
-  usb_board_wall_gap: 20.0
-  lid_lip_depth: 2.4
-  lid_lip_thickness: 1.2
-  fit_clearance: 0.35
-  cutout_min_web: 1.2
-  hole_compensation: 0.2
-  lid_screw_head_diameter: 5.2
-  lid_screw_head_height: 2.5
-  usb_opening_enabled: true
-  usb_guide_enabled: true
-  usb_connector_overhang: 2.0
-  usb_guide_wall_thickness: 1.2
-  usb_guide_end_gap: 1.0
-  usb_opening_width: 12.5
-  usb_opening_height: 7.0
-  usb_opening_radius: 1.5
-  usb_vertical_offset: 0.0
-cutouts:
-- name: Antenna
-  face: left
-  shape: circle
-  horizontal: 30.4
-  z: 31.299999999999997
-  width: 6.5
-  height: 6.5
-  radius: 3.25
-- name: Servo
-  face: rear
-  shape: roundrect
-  horizontal: 20.83
-  z: 35.0
-  width: 10.0
-  height: 5.0
-  radius: 1.25
-- name: Release
-  face: rear
-  shape: circle
-  horizontal: 20.83
-  z: 20.0
-  width: 6.0
-  height: 6.0
-  radius: 3.0
-- name: Power
-  face: front
-  shape: circle
-  horizontal: 20.83
-  z: 31.65
-  width: 8.0
-  height: 8.0
-  radius: 4.0
-outputs:
-  formats:
-  - 3mf
-  coupons: []
-  assembly_exploded_view: 8
-resolved:
-  extra_cutouts:
-  - - left
-    - circle
-    - 30.4
-    - 31.299999999999997
-    - 6.5
-    - 6.5
-    - 3.25
-  - - rear
-    - roundrect
-    - 20.83
-    - 35.0
-    - 10.0
-    - 5.0
-    - 1.25
-  - - rear
-    - circle
-    - 20.83
-    - 20.0
-    - 6.0
-    - 6.0
-    - 3.0
-  - - front
-    - circle
-    - 20.83
-    - 31.65
-    - 8.0
-    - 8.0
-    - 4.0
diff --git a/cases/pan-tilt-head/parameters.json b/cases/pan-tilt-head/parameters.json
deleted file mode 100644
index 2078285..0000000
--- a/cases/pan-tilt-head/parameters.json
+++ /dev/null
@@ -1,75 +0,0 @@
-{
-  "parameterSets": {
-    "pan-tilt-head": {
-      "top_profile": "\"oled128x64\"",
-      "wing_count": "3",
-      "wing_pitch": "12.25",
-      "stack_height_override": "38.0",
-      "generic_component_height": "3.0",
-      "generic_top_gap": "2.0",
-      "gps_antenna_height": "6.0",
-      "gps_top_gap": "5.0",
-      "oled_component_height": "2.4",
-      "oled_display_height": "1.5",
-      "oled_face_gap": "0.8",
-      "button_a": "true",
-      "button_b": "true",
-      "button_c": "true",
-      "button_reset": "false",
-      "button_projection": "1.5",
-      "button_cap_size": "[5.0,3.2]",
-      "button_flange_size": "[6.6,3.6]",
-      "button_flange_thickness": "0.9",
-      "button_travel": "0.5",
-      "button_contact_extension": "0.7",
-      "battery_enabled": "false",
-      "battery_length": "69.0",
-      "battery_diameter": "18.0",
-      "battery_radial_clearance": "0.6",
-      "battery_end_clearance": "1.0",
-      "switch_hole_diameter": "12.0",
-      "switch_hole_compensation": "0.3",
-      "switch_cap_diameter": "8.0",
-      "switch_flange_diameter": "16.2",
-      "switch_body_length": "24.0",
-      "switch_body_diameter": "12.0",
-      "switch_wire_allowance": "3.0",
-      "tripod_insert_enabled": "true",
-      "tripod_insert_length": "6.4",
-      "tripod_insert_hole_diameter": "8.8",
-      "tripod_thread_clearance_diameter": "6.8",
-      "tripod_boss_diameter": "14.0",
-      "m25_insert_length": "4.0",
-      "m25_insert_hole_diameter": "3.7",
-      "m25_screw_clearance": "2.8",
-      "m25_boss_diameter": "7.0",
-      "insert_entry_chamfer": "0.6",
-      "insert_melt_relief": "0.8",
-      "wall_thickness": "2.4",
-      "floor_thickness": "2.4",
-      "lid_thickness": "3.2",
-      "corner_radius": "4.0",
-      "board_bottom_clearance": "5.4",
-      "board_side_clearance": "7.0",
-      "board_rear_clearance": "20.0",
-      "usb_board_wall_gap": "20.0",
-      "lid_lip_depth": "2.4",
-      "lid_lip_thickness": "1.2",
-      "fit_clearance": "0.35",
-      "cutout_min_web": "1.2",
-      "hole_compensation": "0.2",
-      "lid_screw_head_diameter": "5.2",
-      "lid_screw_head_height": "2.5",
-      "usb_opening_enabled": "true",
-      "usb_guide_enabled": "true",
-      "usb_connector_overhang": "2.0",
-      "usb_guide_wall_thickness": "1.2",
-      "usb_guide_end_gap": "1.0",
-      "usb_opening_width": "12.5",
-      "usb_opening_height": "7.0",
-      "usb_opening_radius": "1.5",
-      "usb_vertical_offset": "0.0"
-    }
-  },
-  "fileFormatVersion": "1"
-}
diff --git a/cases/pan-tilt-head/source/feather_case.scad b/cases/pan-tilt-head/source/feather_case.scad
deleted file mode 100644
index 30ac230..0000000
--- a/cases/pan-tilt-head/source/feather_case.scad
+++ /dev/null
@@ -1,965 +0,0 @@
-/*
- * Parametric enclosure for the Adafruit ESP32 Feather V2 and FeatherWings.
- *
- * Coordinate system:
- *   X: USB-C wall (0) toward the rear of the case
- *   Y: non-battery side (0) toward the battery/JST side
- *   Z: outside bottom (0) upward
- *
- * Board coordinates are derived from Adafruit's Eagle PCB files:
- *   https://github.com/adafruit/Adafruit-ESP32-Feather-V2-PCB
- *   https://github.com/adafruit/Adafruit-OLED-FeatherWing-PCB
- */
-
-/* [Output] */
-part = "assembly"; // [assembly,body,lid,buttons,insert_coupon,switch_coupon,fit_coupon]
-exploded_view = 8; // [0:1:20]
-show_references = true;
-
-/* [Stack] */
-top_profile = "generic"; // [generic,gps,oled128x64]
-wing_count = 1; // [1:1:8]
-wing_pitch = 12.25; // [7:0.1:16]
-stack_height_override = 0; // [0:0.1:100]
-generic_component_height = 3; // [0:0.1:30]
-generic_top_gap = 2; // [0.5:0.1:10]
-gps_antenna_height = 6;
-gps_top_gap = 5;
-oled_component_height = 2.4;
-oled_display_height = 1.5;
-oled_face_gap = 0.8;
-
-/* [OLED controls] */
-button_a = true;
-button_b = true;
-button_c = true;
-button_reset = false;
-button_projection = 1.5; // [0.5:0.1:3]
-button_cap_size = [5, 3.2];
-button_flange_size = [6.6, 3.6];
-button_flange_thickness = 0.9;
-button_travel = 0.5;
-button_contact_extension = 0.7;
-
-/* [Battery and switch] */
-battery_enabled = false;
-battery_length = 69;
-battery_diameter = 18;
-battery_radial_clearance = 0.6;
-battery_end_clearance = 1;
-switch_hole_diameter = 12;
-switch_hole_compensation = 0.3;
-switch_cap_diameter = 8;
-switch_flange_diameter = 16.2;
-switch_body_length = 24;
-switch_body_diameter = 12;
-switch_wire_allowance = 3;
-
-/* [Tripod mount] */
-tripod_insert_enabled = false;
-tripod_insert_length = 6.4;
-tripod_insert_hole_diameter = 8.8;
-tripod_thread_clearance_diameter = 6.8;
-tripod_boss_diameter = 14;
-
-/* [M2.5 inserts] */
-m25_insert_length = 4;
-m25_insert_hole_diameter = 3.7;
-m25_screw_clearance = 2.8;
-m25_boss_diameter = 7;
-insert_entry_chamfer = 0.6;
-insert_melt_relief = 0.8;
-
-/* [Shell and fit] */
-wall_thickness = 2.4;
-floor_thickness = 2.4;
-lid_thickness = 3.2;
-corner_radius = 4;
-board_bottom_clearance = 5.4;
-board_side_clearance = 7;
-board_rear_clearance = 4;
-usb_board_wall_gap = 2;
-lid_lip_depth = 2.4;
-lid_lip_thickness = 1.2;
-fit_clearance = 0.35;
-cutout_min_web = 1.2;
-hole_compensation = 0.2;
-lid_screw_head_diameter = 5.2;
-lid_screw_head_height = 2.5;
-
-/* [USB-C opening] */
-usb_opening_enabled = true;
-usb_guide_enabled = true;
-usb_connector_overhang = 2;
-usb_guide_wall_thickness = 1.2;
-usb_guide_end_gap = 1;
-usb_opening_width = 12.5;
-usb_opening_height = 7;
-usb_opening_radius = 1.5;
-usb_vertical_offset = 0;
-
-/* [Custom wall cutouts] */
-// Entry format: [face, shape, u, z, width, height, radius]
-// face: front, rear, left, right. u is Y on front/rear and X on left/right.
-// shape: circle, rect, roundrect, slot. Circle uses width as its diameter.
-extra_cutouts = [];
-
-/* [Calibration] */
-coupon_steps = [-0.3, -0.15, 0, 0.15, 0.3];
-
-$fn = $preview ? 36 : 72;
-eps = 0.02;
-
-// Adafruit Feather mechanical reference, millimetres.
-feather_length = 50.8;
-feather_width = 22.86;
-board_thickness = 1.6;
-mount_x = [2.54, 48.26];
-mount_y = [2.54, 20.32];
-usb_center_y = 11.43;
-
-// Official 128x64 OLED FeatherWing geometry in Feather-board coordinates.
-oled_visible_min = [11.42, 3.78];
-oled_visible_size = [30, 15.3];
-oled_button_a_xy = [4.318, 15.875];
-oled_button_b_xy = [4.318, 11.43];
-oled_button_c_xy = [4.318, 6.985];
-oled_button_reset_xy = [7.366, 20.828];
-
-effective_floor = tripod_insert_enabled
-    ? max(floor_thickness, tripod_insert_length + insert_melt_relief + 1.2)
-    : floor_thickness;
-effective_board_clearance = max(
-    board_bottom_clearance,
-    m25_insert_length + insert_melt_relief + 0.6
-);
-
-board_origin_x = wall_thickness + usb_board_wall_gap;
-board_origin_y = wall_thickness + board_side_clearance;
-board_bottom_z = effective_floor + effective_board_clearance;
-board_top_z = board_bottom_z + board_thickness;
-usb_center_u = board_origin_y + usb_center_y;
-usb_center_z = board_top_z + 1.6 + usb_vertical_offset;
-usb_inner_width = usb_opening_width + hole_compensation;
-usb_inner_height = usb_opening_height + hole_compensation;
-usb_guide_length = max(
-    0,
-    usb_board_wall_gap - usb_connector_overhang - usb_guide_end_gap
-);
-usb_guide_active = usb_opening_enabled && usb_guide_enabled
-    && usb_guide_length > 0;
-usb_reserved_width = usb_inner_width
-    + (usb_guide_active ? 2 * usb_guide_wall_thickness : 0);
-usb_reserved_height = usb_inner_height
-    + (usb_guide_active ? 2 * usb_guide_wall_thickness : 0);
-
-computed_top_pcb_z = board_top_z + wing_count * wing_pitch;
-top_pcb_z = stack_height_override > 0
-    ? board_top_z + stack_height_override
-    : computed_top_pcb_z;
-profile_component_height =
-    top_profile == "gps" ? gps_antenna_height :
-    top_profile == "oled128x64" ? oled_component_height :
-    generic_component_height;
-profile_top_gap =
-    top_profile == "gps" ? gps_top_gap :
-    top_profile == "oled128x64" ? oled_face_gap :
-    generic_top_gap;
-
-partition_y = board_origin_y + feather_width + 1;
-battery_center_y = partition_y + wall_thickness + battery_radial_clearance
-    + battery_diameter / 2;
-battery_start_x = board_origin_x + battery_end_clearance;
-battery_end_x = battery_start_x + battery_length;
-switch_center_x = battery_end_x + max(
-    switch_body_diameter / 2 + 0.8,
-    switch_flange_diameter / 2 + 0.5
-);
-
-case_length_plain = board_origin_x + feather_length
-    + board_rear_clearance + wall_thickness;
-case_length_battery = switch_center_x + switch_flange_diameter / 2
-    + 1.2 + wall_thickness;
-case_length = battery_enabled ? max(case_length_plain, case_length_battery)
-    : case_length_plain;
-
-case_width_plain = board_origin_y + feather_width
-    + board_side_clearance + wall_thickness;
-case_width_battery = battery_center_y + battery_diameter / 2
-    + battery_radial_clearance + wall_thickness;
-case_width = battery_enabled ? max(case_width_plain, case_width_battery)
-    : case_width_plain;
-
-battery_center_z = effective_floor + battery_radial_clearance
-    + battery_diameter / 2;
-switch_center_z = max(
-    effective_floor + switch_flange_diameter / 2 + 1,
-    battery_center_z
-);
-electronics_ceiling_z = top_pcb_z + profile_component_height + profile_top_gap;
-battery_ceiling_z = battery_enabled
-    ? max(
-        battery_center_z + battery_diameter / 2 + battery_radial_clearance,
-        switch_center_z + switch_flange_diameter / 2 + 1
-    )
-    : 0;
-body_height = max(electronics_ceiling_z, battery_ceiling_z);
-
-lid_boss_r = m25_boss_diameter / 2;
-lid_boss_wall_overlap = 0.6;
-lid_boss_xy = [
-    [
-        wall_thickness + lid_boss_r - lid_boss_wall_overlap,
-        wall_thickness + lid_boss_r - lid_boss_wall_overlap
-    ],
-    [
-        case_length - wall_thickness - lid_boss_r + lid_boss_wall_overlap,
-        wall_thickness + lid_boss_r - lid_boss_wall_overlap
-    ],
-    [
-        wall_thickness + lid_boss_r - lid_boss_wall_overlap,
-        case_width - wall_thickness - lid_boss_r + lid_boss_wall_overlap
-    ],
-    [
-        case_length - wall_thickness - lid_boss_r + lid_boss_wall_overlap,
-        case_width - wall_thickness - lid_boss_r + lid_boss_wall_overlap
-    ]
-];
-
-assert(wing_count >= 1, "wing_count must be at least one");
-assert(top_profile == "generic" || top_profile == "gps"
-    || top_profile == "oled128x64", "Unsupported top_profile");
-assert(wall_thickness >= 1.2, "wall_thickness is too small for 0.6 mm FDM");
-assert(lid_lip_thickness >= 1.2, "lid lip needs at least two 0.6 mm lines");
-assert(m25_boss_diameter > m25_insert_hole_diameter + 2,
-    "M2.5 boss does not have enough radial material");
-assert(!tripod_insert_enabled
-    || tripod_boss_diameter > tripod_insert_hole_diameter + 3,
-    "Tripod insert boss does not have enough radial material");
-assert(usb_opening_enabled || !usb_guide_enabled,
-    "USB guide requires the USB opening");
-
-function clamp(v, lo, hi) = min(max(v, lo), hi);
-function cutout_height(entry) = len(entry) > 5 ? entry[5] : entry[4];
-function cutouts_separated(first, second, web) =
-    abs(first[2] - second[2])
-        >= (first[4] + second[4]) / 2 + web
-    || abs(first[3] - second[3])
-        >= (cutout_height(first) + cutout_height(second)) / 2 + web;
-function cutout_clear_of_usb(entry, web) =
-    abs(entry[2] - usb_center_u)
-        >= (entry[4] + usb_reserved_width) / 2 + web
-    || abs(entry[3] - usb_center_z)
-        >= (cutout_height(entry) + usb_reserved_height) / 2 + web;
-
-module validate_cutout_spacing() {
-    if (len(extra_cutouts) > 1)
-        for (first = [0 : len(extra_cutouts) - 2],
-             second = [first + 1 : len(extra_cutouts) - 1])
-            if (extra_cutouts[first][0] == extra_cutouts[second][0])
-                assert(
-                    cutouts_separated(
-                        extra_cutouts[first],
-                        extra_cutouts[second],
-                        cutout_min_web
-                    ),
-                    "Custom cutouts are too close on the same wall"
-                );
-    if (usb_opening_enabled)
-        for (entry = extra_cutouts)
-            if (entry[0] == "front")
-                assert(
-                    cutout_clear_of_usb(entry, cutout_min_web),
-                    "Front cutout is too close to the USB opening or guide"
-                );
-}
-
-module rounded_rect_2d(size, radius) {
-    r = clamp(radius, 0.01, min(size[0], size[1]) / 2 - 0.01);
-    hull() {
-        for (x = [r, size[0] - r], y = [r, size[1] - r])
-            translate([x, y]) circle(r = r);
-    }
-}
-
-module centered_rounded_rect_2d(size, radius) {
-    translate([-size[0] / 2, -size[1] / 2])
-        rounded_rect_2d(size, radius);
-}
-
-module centered_rounded_prism(size, height, radius) {
-    linear_extrude(height = height)
-        centered_rounded_rect_2d(size, radius);
-}
-
-module rounded_box(size, radius) {
-    linear_extrude(height = size[2])
-        rounded_rect_2d([size[0], size[1]], radius);
-}
-
-module insert_pocket(diameter, depth, entry_z, downward = true) {
-    bore_d = diameter + hole_compensation;
-    if (downward) {
-        translate([0, 0, entry_z - depth])
-            cylinder(h = depth + eps, d = bore_d);
-        translate([0, 0, entry_z - insert_entry_chamfer])
-            cylinder(
-                h = insert_entry_chamfer + eps,
-                d1 = bore_d,
-                d2 = bore_d + 2 * insert_entry_chamfer
-            );
-    } else {
-        translate([0, 0, entry_z - eps])
-            cylinder(h = depth + eps, d = bore_d);
-        translate([0, 0, entry_z - eps])
-            cylinder(
-                h = insert_entry_chamfer + eps,
-                d1 = bore_d + 2 * insert_entry_chamfer,
-                d2 = bore_d
-            );
-    }
-}
-
-module face_rounded_cutout(face, u, z, width, height, radius) {
-    r = clamp(radius, 0.01, min(width, height) / 2);
-    depth = wall_thickness + 2 * eps;
-    if (face == "front" || face == "rear") {
-        x0 = face == "front" ? -eps : case_length - wall_thickness - eps;
-        hull()
-            for (yy = [u - width / 2 + r, u + width / 2 - r],
-                 zz = [z - height / 2 + r, z + height / 2 - r])
-                translate([x0, yy, zz])
-                    rotate([0, 90, 0]) cylinder(h = depth, r = r);
-    } else if (face == "left" || face == "right") {
-        y0 = face == "left" ? -eps : case_width - wall_thickness - eps;
-        hull()
-            for (xx = [u - width / 2 + r, u + width / 2 - r],
-                 zz = [z - height / 2 + r, z + height / 2 - r])
-                translate([xx, y0, zz])
-                    rotate([-90, 0, 0]) cylinder(h = depth, r = r);
-    }
-}
-
-module face_circle_cutout(face, u, z, diameter) {
-    depth = wall_thickness + 2 * eps;
-    if (face == "front")
-        translate([-eps, u, z])
-            rotate([0, 90, 0]) cylinder(h = depth, d = diameter);
-    else if (face == "rear")
-        translate([case_length - wall_thickness - eps, u, z])
-            rotate([0, 90, 0]) cylinder(h = depth, d = diameter);
-    else if (face == "left")
-        translate([u, -eps, z])
-            rotate([-90, 0, 0]) cylinder(h = depth, d = diameter);
-    else if (face == "right")
-        translate([u, case_width - wall_thickness - eps, z])
-            rotate([-90, 0, 0]) cylinder(h = depth, d = diameter);
-}
-
-module x_rounded_prism(x, length, u, z, width, height, radius) {
-    r = clamp(radius, 0.01, min(width, height) / 2 - 0.01);
-    hull()
-        for (yy = [u - width / 2 + r, u + width / 2 - r],
-             zz = [z - height / 2 + r, z + height / 2 - r])
-            translate([x, yy, zz])
-                rotate([0, 90, 0]) cylinder(h = length, r = r);
-}
-
-module usb_guide_shell() {
-    outer_width = usb_inner_width + 2 * usb_guide_wall_thickness;
-    outer_height = usb_inner_height + 2 * usb_guide_wall_thickness;
-    difference() {
-        x_rounded_prism(
-            wall_thickness - eps,
-            usb_guide_length + 2 * eps,
-            usb_center_u,
-            usb_center_z,
-            outer_width,
-            outer_height,
-            usb_opening_radius + usb_guide_wall_thickness
-        );
-        x_rounded_prism(
-            wall_thickness - 2 * eps,
-            usb_guide_length + 4 * eps,
-            usb_center_u,
-            usb_center_z,
-            usb_inner_width,
-            usb_inner_height,
-            usb_opening_radius
-        );
-    }
-}
-
-module custom_wall_cutout(entry) {
-    face = entry[0];
-    shape = entry[1];
-    u = entry[2];
-    z = entry[3];
-    width = entry[4];
-    height = len(entry) > 5 ? entry[5] : width;
-    radius = len(entry) > 6 ? entry[6] : min(width, height) / 2;
-    assert(face == "front" || face == "rear"
-        || face == "left" || face == "right", "Invalid cutout face");
-    assert(shape == "circle" || shape == "rect"
-        || shape == "roundrect" || shape == "slot", "Invalid cutout shape");
-    assert(z - height / 2 >= effective_floor,
-        "Cutout intersects the floor");
-    assert(z + height / 2 <= body_height - lid_lip_depth,
-        "Cutout intersects the lid locating lip");
-    assert(
-        (face == "front" || face == "rear")
-            ? u - width / 2 >= 0 && u + width / 2 <= case_width
-            : u - width / 2 >= 0 && u + width / 2 <= case_length,
-        "Cutout extends beyond its wall"
-    );
-
-    if (shape == "circle")
-        face_circle_cutout(face, u, z, width);
-    else
-        face_rounded_cutout(
-            face, u, z, width, height,
-            shape == "rect" ? 0.02 :
-            shape == "slot" ? min(width, height) / 2 : radius
-        );
-}
-
-module board_standoffs() {
-    for (mx = mount_x, my = mount_y)
-        translate([
-            board_origin_x + mx,
-            board_origin_y + my,
-            effective_floor - eps
-        ])
-            cylinder(
-                h = effective_board_clearance + eps,
-                d = m25_boss_diameter
-            );
-}
-
-module lid_bosses() {
-    for (p = lid_boss_xy)
-        translate([p[0], p[1], effective_floor - eps])
-            cylinder(
-                h = body_height - effective_floor + eps,
-                d = m25_boss_diameter
-            );
-}
-
-module battery_cradle() {
-    partition_height = min(
-        body_height - lid_lip_depth - 0.5,
-        battery_center_z + battery_diameter / 2 + 1.5
-    );
-    rib_width = 2.4;
-    rib_positions = [
-        battery_start_x + 4,
-        (battery_start_x + battery_end_x) / 2,
-        battery_end_x - 4
-    ];
-
-    // Board/battery partition, with a lead-routing notch near the JST end.
-    difference() {
-        translate([wall_thickness, partition_y, effective_floor - eps])
-            cube([
-                battery_end_x - wall_thickness + battery_end_clearance,
-                wall_thickness,
-                partition_height - effective_floor + eps
-            ]);
-        translate([
-            board_origin_x + 6.5,
-            partition_y - eps,
-            effective_floor + 1.5
-        ])
-            cube([9, wall_thickness + 2 * eps, 6]);
-    }
-
-    // Three low curved ribs cradle the protected cylindrical pack.
-    for (x = rib_positions)
-        difference() {
-            translate([
-                x - rib_width / 2,
-                battery_center_y - battery_diameter / 2
-                    - battery_radial_clearance,
-                effective_floor - eps
-            ])
-                cube([
-                    rib_width,
-                    battery_diameter + 2 * battery_radial_clearance,
-                    battery_diameter / 2 + battery_radial_clearance + eps
-                ]);
-            translate([x - rib_width, battery_center_y, battery_center_z])
-                rotate([0, 90, 0])
-                    cylinder(
-                        h = rib_width * 2,
-                        d = battery_diameter + 2 * battery_radial_clearance
-                    );
-        }
-
-    // End stops remain below the cell center so the lid can remove vertically.
-    for (x = [
-        battery_start_x - battery_end_clearance - wall_thickness,
-        battery_end_x + battery_end_clearance
-    ])
-        translate([
-            x,
-            battery_center_y - battery_diameter / 2 - battery_radial_clearance,
-            effective_floor - eps
-        ])
-            cube([
-                wall_thickness,
-                battery_diameter + 2 * battery_radial_clearance,
-                battery_diameter / 2 + 1 + eps
-            ]);
-
-    // Rear cross-strip separates the side-mounted switch body from the cell.
-    translate([
-        battery_end_x + battery_end_clearance,
-        partition_y,
-        effective_floor - eps
-    ])
-        cube([
-            case_length - wall_thickness - battery_end_x - battery_end_clearance,
-            case_width - wall_thickness - partition_y,
-            min(body_height - effective_floor, switch_center_z
-                + switch_body_diameter / 2 + switch_wire_allowance
-                - effective_floor) + eps
-        ]);
-}
-
-module body_positive() {
-    union() {
-        difference() {
-            rounded_box([case_length, case_width, body_height], corner_radius);
-            translate([wall_thickness, wall_thickness, effective_floor])
-                rounded_box([
-                    case_length - 2 * wall_thickness,
-                    case_width - 2 * wall_thickness,
-                    body_height - effective_floor + eps
-                ], max(0.6, corner_radius - wall_thickness));
-        }
-        board_standoffs();
-        lid_bosses();
-        if (battery_enabled)
-            battery_cradle();
-        if (tripod_insert_enabled)
-            translate([case_length / 2, case_width / 2, 0])
-                cylinder(h = effective_floor, d = tripod_boss_diameter);
-        if (usb_guide_active)
-            usb_guide_shell();
-    }
-}
-
-module body_cutouts() {
-    // Board mounting insert pockets, loaded from above before the Feather.
-    for (mx = mount_x, my = mount_y)
-        translate([board_origin_x + mx, board_origin_y + my, 0])
-            insert_pocket(
-                m25_insert_hole_diameter,
-                m25_insert_length + insert_melt_relief,
-                board_bottom_z
-            );
-
-    // Lid insert pockets, loaded from the top of the body.
-    for (p = lid_boss_xy)
-        translate([p[0], p[1], 0])
-            insert_pocket(
-                m25_insert_hole_diameter,
-                m25_insert_length + insert_melt_relief,
-                body_height
-            );
-
-    // USB-C cable opening. Connector center is from the official ESP32 V2 PCB.
-    if (usb_opening_enabled)
-        face_rounded_cutout(
-            "front",
-            usb_center_u,
-            usb_center_z,
-            usb_inner_width,
-            usb_inner_height,
-            usb_opening_radius
-        );
-
-    if (battery_enabled) {
-        face_circle_cutout(
-            "right",
-            switch_center_x,
-            switch_center_z,
-            switch_hole_diameter + switch_hole_compensation
-        );
-        // Clear the switch body and its prewired terminals through the rear bay.
-        translate([
-            switch_center_x,
-            case_width - wall_thickness + eps,
-            switch_center_z
-        ])
-            rotate([90, 0, 0])
-                cylinder(
-                    h = switch_body_length + switch_wire_allowance
-                        + wall_thickness + eps,
-                    d = switch_body_diameter + 2 * fit_clearance
-                );
-    }
-
-    if (tripod_insert_enabled) {
-        translate([case_length / 2, case_width / 2, 0]) {
-            translate([0, 0, -eps])
-                cylinder(
-                    h = effective_floor + 2 * eps,
-                    d = tripod_thread_clearance_diameter + hole_compensation
-                );
-            insert_pocket(
-                tripod_insert_hole_diameter,
-                tripod_insert_length + insert_melt_relief,
-                effective_floor
-            );
-        }
-    }
-
-    for (entry = extra_cutouts)
-        custom_wall_cutout(entry);
-}
-
-module body() {
-    difference() {
-        body_positive();
-        body_cutouts();
-    }
-}
-
-module lid_plate_positive() {
-    union() {
-        rounded_box([case_length, case_width, lid_thickness], corner_radius);
-        // Inset rim: exported pointing upward so the outer lid face prints flat.
-        translate([
-            wall_thickness + fit_clearance,
-            wall_thickness + fit_clearance,
-            lid_thickness
-        ])
-            linear_extrude(height = lid_lip_depth)
-                difference() {
-                    rounded_rect_2d([
-                        case_length - 2 * (wall_thickness + fit_clearance),
-                        case_width - 2 * (wall_thickness + fit_clearance)
-                    ], max(0.6, corner_radius - wall_thickness));
-                    translate([lid_lip_thickness, lid_lip_thickness])
-                        rounded_rect_2d([
-                            case_length - 2 * (
-                                wall_thickness + fit_clearance
-                                + lid_lip_thickness
-                            ),
-                            case_width - 2 * (
-                                wall_thickness + fit_clearance
-                                + lid_lip_thickness
-                            )
-                        ], max(0.5, corner_radius - wall_thickness
-                            - lid_lip_thickness));
-                }
-    }
-}
-
-module beveled_oled_window() {
-    inner_size = oled_visible_size;
-    outer_size = [oled_visible_size[0] + 3, oled_visible_size[1] + 3];
-    center = [
-        board_origin_x + oled_visible_min[0] + oled_visible_size[0] / 2,
-        board_origin_y + oled_visible_min[1] + oled_visible_size[1] / 2
-    ];
-    hull() {
-        translate([center[0], center[1], -eps])
-            linear_extrude(height = eps)
-                centered_rounded_rect_2d(outer_size, 1.5);
-        translate([center[0], center[1], lid_thickness - eps])
-            linear_extrude(height = 2 * eps)
-                centered_rounded_rect_2d(inner_size, 0.8);
-    }
-}
-
-module oled_button_lid_cutout(xy) {
-    center = [board_origin_x + xy[0], board_origin_y + xy[1]];
-    shaft_size = [
-        button_cap_size[0] + fit_clearance * 2,
-        button_cap_size[1] + fit_clearance * 2
-    ];
-    recess_size = [
-        button_flange_size[0] + fit_clearance * 2,
-        button_flange_size[1] + fit_clearance * 2
-    ];
-    recess_depth = button_flange_thickness + button_travel;
-    translate([center[0], center[1], -eps])
-        centered_rounded_prism(
-            shaft_size,
-            lid_thickness + 2 * eps,
-            shaft_size[1] / 2
-        );
-    translate([center[0], center[1], lid_thickness - recess_depth])
-        centered_rounded_prism(
-            recess_size,
-            recess_depth + lid_lip_depth + eps,
-            recess_size[1] / 2
-        );
-}
-
-module lid_cutouts() {
-    // Through holes plus shallow counterbores for flush M2.5 socket heads.
-    for (p = lid_boss_xy) {
-        translate([p[0], p[1], -eps])
-            cylinder(
-                h = lid_thickness + lid_lip_depth + 2 * eps,
-                d = m25_screw_clearance + hole_compensation
-            );
-        translate([p[0], p[1], -eps])
-            cylinder(
-                h = lid_screw_head_height + eps,
-                d = lid_screw_head_diameter + hole_compensation
-            );
-    }
-
-    if (top_profile == "oled128x64") {
-        beveled_oled_window();
-        if (button_a) oled_button_lid_cutout(oled_button_a_xy);
-        if (button_b) oled_button_lid_cutout(oled_button_b_xy);
-        if (button_c) oled_button_lid_cutout(oled_button_c_xy);
-        if (button_reset) oled_button_lid_cutout(oled_button_reset_xy);
-    }
-}
-
-module lid() {
-    difference() {
-        lid_plate_positive();
-        lid_cutouts();
-    }
-}
-
-module one_oled_button() {
-    recess_depth = button_flange_thickness + button_travel;
-    stem_height = lid_thickness - recess_depth + button_projection;
-    // Print outer cap face down. The flange and contact nub build upward.
-    centered_rounded_prism(
-        button_cap_size,
-        stem_height,
-        button_cap_size[1] / 2
-    );
-    translate([0, 0, stem_height])
-        centered_rounded_prism(
-            button_flange_size,
-            button_flange_thickness,
-            button_flange_size[1] / 2
-        );
-    translate([0, 0, stem_height + button_flange_thickness])
-        cylinder(h = button_contact_extension, d = 3);
-}
-
-module buttons() {
-    enabled = [
-        button_a,
-        button_b,
-        button_c,
-        button_reset
-    ];
-    count_enabled = len([for (v = enabled) if (v) 1]);
-    if (count_enabled == 0)
-        echo("No OLED buttons are enabled.");
-    for (i = [0 : len(enabled) - 1])
-        if (enabled[i])
-            translate([i * (button_flange_size[0] + 3), 0, 0])
-                one_oled_button();
-}
-
-module reference_board() {
-    color([0.05, 0.25, 0.55, 0.75])
-        translate([board_origin_x, board_origin_y, board_bottom_z])
-            rounded_box([feather_length, feather_width, board_thickness], 2.54);
-    color([0.12, 0.45, 0.75, 0.45])
-        for (i = [1 : wing_count])
-            translate([
-                board_origin_x,
-                board_origin_y,
-                board_top_z + i * wing_pitch - board_thickness
-            ])
-                rounded_box(
-                    [feather_length, feather_width, board_thickness], 2.54
-                );
-}
-
-module reference_top_feature() {
-    if (top_profile == "gps")
-        color([0.92, 0.78, 0.35, 0.8])
-            translate([
-                board_origin_x + 31,
-                board_origin_y + (feather_width - 15) / 2,
-                top_pcb_z
-            ])
-                cube([15, 15, gps_antenna_height]);
-    else if (top_profile == "oled128x64") {
-        color([0.12, 0.12, 0.12, 0.9])
-            translate([
-                board_origin_x + oled_visible_min[0],
-                board_origin_y + oled_visible_min[1],
-                top_pcb_z
-            ])
-                cube([
-                    oled_visible_size[0],
-                    oled_visible_size[1],
-                    oled_display_height
-                ]);
-        color([0.6, 0.6, 0.6, 0.9])
-            for (xy = [
-                oled_button_a_xy,
-                oled_button_b_xy,
-                oled_button_c_xy,
-                oled_button_reset_xy
-            ])
-                translate([
-                    board_origin_x + xy[0],
-                    board_origin_y + xy[1],
-                    top_pcb_z
-                ])
-                    cylinder(h = 1.6, d = 2.1);
-    } else
-        color([0.3, 0.65, 0.35, 0.6])
-            translate([
-                board_origin_x + 10,
-                board_origin_y + 4,
-                top_pcb_z
-            ])
-                cube([
-                    feather_length - 20,
-                    feather_width - 8,
-                    generic_component_height
-                ]);
-}
-
-module reference_battery_and_switch() {
-    if (battery_enabled) {
-        color([0.35, 0.18, 0.55, 0.75])
-            translate([battery_start_x, battery_center_y, battery_center_z])
-                rotate([0, 90, 0])
-                    cylinder(h = battery_length, d = battery_diameter);
-        color([0.8, 0.15, 0.1, 0.65])
-            translate([
-                switch_center_x,
-                case_width - wall_thickness,
-                switch_center_z
-            ])
-                rotate([90, 0, 0]) {
-                    cylinder(h = switch_body_length, d = switch_body_diameter);
-                    translate([0, 0, -1.5])
-                        cylinder(h = 1.5, d = switch_flange_diameter);
-                    translate([0, 0, -3])
-                        cylinder(h = 3, d = switch_cap_diameter);
-                }
-    }
-}
-
-module assembly() {
-    color([0.82, 0.84, 0.88, 1]) body();
-    if ($preview && show_references) {
-        reference_board();
-        reference_top_feature();
-        reference_battery_and_switch();
-    }
-    // Printable lid is mirrored into its installed orientation and exploded up.
-    color([0.92, 0.92, 0.95, 0.88])
-        translate([0, case_width, body_height + lid_thickness + exploded_view])
-            rotate([180, 0, 0])
-                lid();
-}
-
-module coupon_hole(x, y, diameter, depth) {
-    translate([x, y, -eps]) cylinder(h = depth + 2 * eps, d = diameter);
-}
-
-module insert_coupon() {
-    spacing = 15;
-    coupon_length = spacing * len(coupon_steps) + 8;
-    coupon_width = 32;
-    coupon_height = max(
-        m25_insert_length + insert_melt_relief + 1.2,
-        tripod_insert_length + insert_melt_relief + 1.2
-    );
-    difference() {
-        rounded_box([coupon_length, coupon_width, coupon_height], 3);
-        for (i = [0 : len(coupon_steps) - 1]) {
-            x = 7 + i * spacing;
-            coupon_hole(
-                x, 8,
-                m25_insert_hole_diameter + coupon_steps[i],
-                m25_insert_length + insert_melt_relief
-            );
-            coupon_hole(
-                x, 23,
-                tripod_insert_hole_diameter + coupon_steps[i],
-                tripod_insert_length + insert_melt_relief
-            );
-        }
-    }
-}
-
-module switch_coupon() {
-    spacing = 18;
-    coupon_length = spacing * len(coupon_steps) + 6;
-    coupon_width = 24;
-    coupon_height = wall_thickness;
-    difference() {
-        rounded_box([coupon_length, coupon_width, coupon_height], 3);
-        for (i = [0 : len(coupon_steps) - 1])
-            translate([6 + i * spacing, coupon_width / 2, -eps])
-                cylinder(
-                    h = coupon_height + 2 * eps,
-                    d = switch_hole_diameter + coupon_steps[i]
-                );
-    }
-}
-
-module fit_coupon() {
-    segment_length = 34;
-    base_width = 16;
-    base_height = 6;
-    cavity_size = [segment_length - 8, base_width - 8];
-    male_size = [
-        cavity_size[0] - 2 * fit_clearance,
-        cavity_size[1] - 2 * fit_clearance
-    ];
-    difference() {
-        rounded_box([segment_length, base_width, base_height], 2);
-        translate([4, 4, 2])
-            cube([segment_length - 8, base_width - 8, base_height]);
-    }
-    translate([segment_length + 5, 0, 0])
-        union() {
-            cube([segment_length, base_width, lid_thickness]);
-            translate([
-                4 + fit_clearance,
-                4 + fit_clearance,
-                lid_thickness - eps
-            ])
-                linear_extrude(height = lid_lip_depth + eps)
-                    difference() {
-                        rounded_rect_2d(male_size, 1);
-                        translate([lid_lip_thickness, lid_lip_thickness])
-                            rounded_rect_2d([
-                                male_size[0] - 2 * lid_lip_thickness,
-                                male_size[1] - 2 * lid_lip_thickness
-                            ], 0.5);
-                    }
-        }
-}
-
-validate_cutout_spacing();
-
-if (part == "assembly")
-    assembly();
-else if (part == "body")
-    body();
-else if (part == "lid")
-    lid();
-else if (part == "buttons")
-    buttons();
-else if (part == "insert_coupon")
-    insert_coupon();
-else if (part == "switch_coupon")
-    switch_coupon();
-else if (part == "fit_coupon")
-    fit_coupon();
-else
-    assert(false, str("Unknown part: ", part));
diff --git a/cases/pan-tilt-head/source/render_stl_previews.py b/cases/pan-tilt-head/source/render_stl_previews.py
deleted file mode 100644
index c8675ac..0000000
--- a/cases/pan-tilt-head/source/render_stl_previews.py
+++ /dev/null
@@ -1,127 +0,0 @@
-"""Render six inspection views of an STL using Blender.
-
-Usage:
-    blender --background --python tools/render_stl_previews.py -- \
-        input.stl output-directory basename [comma-separated-views]
-"""
-
-import os
-import sys
-
-import bpy
-from mathutils import Vector
-
-
-def arguments():
-    args = sys.argv[sys.argv.index("--") + 1 :]
-    if len(args) not in (3, 4):
-        raise SystemExit(
-            "expected: input.stl output-directory basename [comma-separated-views]"
-        )
-    requested_views = args[3].split(",") if len(args) == 4 else None
-    return args[0], args[1], args[2], requested_views
-
-
-def look_at(camera, target):
-    direction = Vector(target) - camera.location
-    camera.rotation_euler = direction.to_track_quat("-Z", "Y").to_euler()
-
-
-def render_view(camera, center, span, name, direction, output_dir, basename):
-    distance = span * 2.2
-    camera.location = Vector(center) + Vector(direction).normalized() * distance
-    look_at(camera, center)
-    camera.data.type = "ORTHO"
-    camera.data.ortho_scale = span * 1.35
-    bpy.context.scene.render.filepath = os.path.join(
-        output_dir, f"{basename}_{name}.png"
-    )
-    bpy.ops.render.render(write_still=True)
-
-
-def main():
-    input_path, output_dir, basename, requested_views = arguments()
-    os.makedirs(output_dir, exist_ok=True)
-
-    bpy.ops.wm.read_factory_settings(use_empty=True)
-    bpy.ops.wm.stl_import(filepath=os.path.abspath(input_path))
-    model = bpy.context.selected_objects[0]
-    model.name = "Feather case"
-
-    material = bpy.data.materials.new("Case material")
-    material.diffuse_color = (0.16, 0.42, 0.72, 1.0)
-    material.metallic = 0.0
-    material.roughness = 0.45
-    model.data.materials.append(material)
-
-    corners = [model.matrix_world @ Vector(corner) for corner in model.bound_box]
-    mins = Vector([min(v[i] for v in corners) for i in range(3)])
-    maxs = Vector([max(v[i] for v in corners) for i in range(3)])
-    center = (mins + maxs) / 2
-    span = max(maxs - mins)
-
-    world = bpy.data.worlds.new("Inspection world")
-    world.use_nodes = True
-    world.node_tree.nodes["Background"].inputs["Color"].default_value = (
-        0.035,
-        0.04,
-        0.05,
-        1,
-    )
-    world.node_tree.nodes["Background"].inputs["Strength"].default_value = 0.5
-    bpy.context.scene.world = world
-
-    camera_data = bpy.data.cameras.new("Camera")
-    camera = bpy.data.objects.new("Camera", camera_data)
-    bpy.context.collection.objects.link(camera)
-    bpy.context.scene.camera = camera
-
-    key_data = bpy.data.lights.new("Key", type="AREA")
-    key_data.energy = 900
-    key_data.shape = "DISK"
-    key_data.size = span
-    key = bpy.data.objects.new("Key", key_data)
-    key.location = center + Vector((span, -span, span * 1.5))
-    bpy.context.collection.objects.link(key)
-
-    fill_data = bpy.data.lights.new("Fill", type="AREA")
-    fill_data.energy = 500
-    fill_data.size = span
-    fill = bpy.data.objects.new("Fill", fill_data)
-    fill.location = center + Vector((-span, span, span))
-    bpy.context.collection.objects.link(fill)
-
-    scene = bpy.context.scene
-    scene.render.engine = "BLENDER_WORKBENCH"
-    scene.render.resolution_x = 800
-    scene.render.resolution_y = 600
-    scene.render.resolution_percentage = 100
-    scene.render.image_settings.file_format = "PNG"
-    scene.render.film_transparent = False
-    scene.display.shading.light = "STUDIO"
-    scene.display.shading.color_type = "MATERIAL"
-    scene.display.shading.show_shadows = True
-    scene.display.shading.show_cavity = True
-    scene.display.shading.cavity_type = "BOTH"
-    scene.display.shading.curvature_ridge_factor = 1.5
-    scene.display.shading.curvature_valley_factor = 1.2
-
-    views = {
-        "iso": (1, -1, 0.8),
-        "front": (-1, 0, 0),
-        "back": (1, 0, 0),
-        "left": (0, -1, 0),
-        "right": (0, 1, 0),
-        "top": (0, 0, 1),
-    }
-    selected = requested_views or list(views)
-    unknown = sorted(set(selected) - set(views))
-    if unknown:
-        raise SystemExit(f"unknown views: {', '.join(unknown)}")
-    for name in selected:
-        direction = views[name]
-        render_view(camera, center, span, name, direction, output_dir, basename)
-
-
-if __name__ == "__main__":
-    main()
diff --git a/feather_case.scad b/feather_case.scad
index 7948af5..92aab0f 100644
--- a/feather_case.scad
+++ b/feather_case.scad
@@ -48,10 +48,15 @@ battery_diameter = 18;
 battery_radial_clearance = 0.6;
 battery_end_clearance = 1;
 battery_partition_thickness = 1.8;
+battery_board_clearance = 3;
 rocker_cutout_size = [12.9, 19.4];
 rocker_corner_radius = 0.8;
 rocker_body_size = [15, 21, 21];
 rocker_artwork_gap = 2;
+rocker_partition_offset = 2;
+rocker_tab_panel_thickness = 2;
+rocker_tab_land = 2;
+rocker_tab_taper_length = 0.6;
 
 /* [Tripod mount] */
 tripod_insert_enabled = false;
@@ -104,10 +109,10 @@ usb_guide_enabled = true;
 usb_connector_overhang = 2;
 usb_guide_wall_thickness = 1.2;
 usb_guide_end_gap = 1;
-usb_opening_width = 12.5;
-usb_opening_height = 7;
+usb_opening_width = 13.5;
+usb_opening_height = 8;
 usb_opening_radius = 1.5;
-usb_vertical_offset = 0;
+usb_vertical_offset = 0.5;
 
 /* [Custom wall cutouts] */
 // Entry format: [face, shape, u, z, width, height, radius]
@@ -191,7 +196,7 @@ profile_top_gap =
     top_profile == "oled128x64" ? oled_face_gap :
     generic_top_gap;
 
-partition_y = board_origin_y + feather_width + 1;
+partition_y = board_origin_y + feather_width + battery_board_clearance;
 battery_center_y = partition_y + battery_partition_thickness
     + battery_radial_clearance + battery_diameter / 2;
 battery_start_x = front_lid_boss_center + lid_boss_r
@@ -212,10 +217,14 @@ case_width_battery = battery_center_y + battery_diameter / 2
 case_width = battery_enabled ? max(case_width_plain, case_width_battery)
     : case_width_plain;
 
-rocker_center_x = case_length - wall_thickness - fit_clearance
+rocker_installed_center_x = case_length - wall_thickness - fit_clearance
     - lid_lip_thickness - fit_clearance - rocker_body_size[0] / 2;
-rocker_center_y = front_lid_boss_center + lid_boss_r + fit_clearance
-    + rocker_body_size[1] / 2;
+rocker_installed_center_y = front_lid_boss_center + lid_boss_r + fit_clearance
+    + rocker_body_size[1] / 2 + rocker_partition_offset;
+// The printable lid is flipped across Y when installed, so its local cutout
+// coordinate must be mirrored from the assembled switch location.
+rocker_lid_center_x = rocker_installed_center_x;
+rocker_lid_center_y = case_width - rocker_installed_center_y;
 
 lid_artwork_enabled = lid_label != "" || lid_logo_enabled;
 lid_art_rotation =
@@ -223,7 +232,7 @@ lid_art_rotation =
     lid_art_orientation == "usb_front" ? 90 :
     lid_art_orientation == "usb_right" ? 180 : 270;
 lid_art_safe_max_x = battery_enabled
-    ? rocker_center_x - rocker_cutout_size[0] / 2 - rocker_artwork_gap
+    ? rocker_lid_center_x - rocker_cutout_size[0] / 2 - rocker_artwork_gap
     : case_length - lid_art_margin;
 lid_art_physical_size = [
     lid_art_safe_max_x - lid_art_margin,
@@ -294,6 +303,34 @@ lid_boss_xy = [
         case_width - wall_thickness - lid_boss_r + lid_boss_wall_overlap
     ]
 ];
+rocker_boss_clearance = min([
+    for (p = lid_boss_xy)
+        sqrt(
+            pow(max(
+                abs(p[0] - rocker_installed_center_x)
+                    - rocker_body_size[0] / 2,
+                0
+            ), 2)
+            + pow(max(
+                abs(p[1] - rocker_installed_center_y)
+                    - rocker_body_size[1] / 2,
+                0
+            ), 2)
+        ) - lid_boss_r
+]);
+rocker_relief_half_size = [
+    rocker_cutout_size[0] / 2,
+    rocker_cutout_size[1] / 2 + rocker_tab_land + rocker_tab_taper_length
+];
+rocker_relief_boss_clearance = min([
+    for (p = lid_boss_xy)
+        sqrt(
+            pow(max(abs(p[0] - rocker_lid_center_x)
+                - rocker_relief_half_size[0], 0), 2)
+            + pow(max(abs(p[1] - rocker_lid_center_y)
+                - rocker_relief_half_size[1], 0), 2)
+        ) - lid_boss_r
+]);
 
 assert(wing_count >= 1, "wing_count must be at least one");
 assert(top_profile == "generic" || top_profile == "gps"
@@ -301,6 +338,14 @@ assert(top_profile == "generic" || top_profile == "gps"
 assert(wall_thickness >= 1.2, "wall_thickness is too small for 0.6 mm FDM");
 assert(battery_partition_thickness >= 1.2,
     "battery_partition_thickness is too small for 0.6 mm FDM");
+assert(battery_board_clearance > 0,
+    "battery_board_clearance must be positive");
+assert(rocker_tab_panel_thickness >= 1.2,
+    "rocker tab panel needs at least two 0.6 mm lines");
+assert(rocker_tab_panel_thickness < lid_thickness,
+    "rocker tab panel must be thinner than the lid");
+assert(rocker_tab_land > 0 && rocker_tab_taper_length > 0,
+    "rocker tab relief land and taper must be positive");
 assert(lid_lip_thickness >= 1.2, "lid lip needs at least two 0.6 mm lines");
 assert(lid_art_orientation == "usb_left"
     || lid_art_orientation == "usb_front"
@@ -325,6 +370,13 @@ assert(!tripod_insert_enabled
     "Tripod insert boss does not have enough radial material");
 assert(usb_opening_enabled || !usb_guide_enabled,
     "USB guide requires the USB opening");
+assert(!usb_opening_enabled
+    || usb_center_z - usb_reserved_height / 2 >= effective_floor,
+    "USB opening or guide intersects the case floor");
+assert(!usb_opening_enabled
+    || usb_center_z + usb_reserved_height / 2
+        <= body_height - lid_lip_depth,
+    "USB opening or guide intersects the lid lip");
 assert(!tripod_insert_enabled
     || tripod_insert_outer_diameter >= tripod_insert_hole_diameter,
     "Tripod insert entry must not be smaller than its pilot");
@@ -334,13 +386,35 @@ assert(!battery_enabled || !tripod_insert_enabled
     || tripod_partition_clearance >= 1,
     "Tripod insert entry is too close to the battery partition");
 assert(!battery_enabled
-    || rocker_center_x - rocker_body_size[0] / 2
+    || rocker_installed_center_x - rocker_body_size[0] / 2
         >= board_origin_x + feather_length + fit_clearance,
     "Rocker body overlaps the Feather PCB");
 assert(!battery_enabled
-    || rocker_center_y + rocker_body_size[1] / 2
+    || rocker_installed_center_y + rocker_body_size[1] / 2
         <= partition_y - fit_clearance,
     "Rocker body overlaps the battery partition");
+assert(!battery_enabled
+    || rocker_installed_center_x - rocker_body_size[0] / 2
+        >= wall_thickness + lid_lip_thickness + fit_clearance,
+    "Rocker body overlaps the front lid lip");
+assert(!battery_enabled
+    || rocker_installed_center_x + rocker_body_size[0] / 2
+        <= case_length - wall_thickness - lid_lip_thickness - fit_clearance,
+    "Rocker body overlaps the rear lid lip");
+assert(!battery_enabled
+    || rocker_installed_center_y - rocker_body_size[1] / 2
+        >= wall_thickness + lid_lip_thickness + fit_clearance,
+    "Rocker body overlaps the Feather-side lid lip");
+assert(!battery_enabled || rocker_boss_clearance >= fit_clearance - eps,
+    "Rocker body overlaps a lid boss");
+assert(!battery_enabled
+    || rocker_relief_boss_clearance >= fit_clearance - eps,
+    "Rocker tab relief overlaps a lid boss scallop");
+assert(!battery_enabled
+    || abs(
+        case_width - rocker_lid_center_y - rocker_installed_center_y
+    ) < eps,
+    "Rocker lid cutout does not mirror to the installed switch location");
 assert(!battery_enabled
     || body_height - rocker_body_size[2] >= effective_floor,
     "Rocker body intersects the case floor");
@@ -803,13 +877,18 @@ module lid_cutouts() {
             );
     }
 
-    if (battery_enabled)
-        translate([rocker_center_x, rocker_center_y, -eps])
+    if (battery_enabled) {
+        translate([rocker_lid_center_x, rocker_lid_center_y, -eps])
             centered_rounded_prism(
                 rocker_cutout_size,
                 lid_thickness + lid_lip_depth + 2 * eps,
                 rocker_corner_radius
             );
+        rocker_tab_reliefs(
+            [rocker_lid_center_x, rocker_lid_center_y],
+            rocker_cutout_size
+        );
+    }
 
     if (top_profile == "oled128x64") {
         beveled_oled_window();
@@ -820,6 +899,41 @@ module lid_cutouts() {
     }
 }
 
+// Thin the horizontal top/bottom edges of the upright switch opening where the
+// spring tabs latch. Each full-width land overlaps the rounded opening by its
+// corner radius, then extends outward before tapering to the surrounding lid.
+module rocker_tab_reliefs(center, opening_size) {
+    relief_depth = lid_thickness - rocker_tab_panel_thickness;
+    opening_overlap = rocker_corner_radius;
+    strip = 0.02;
+    for (side = [-1, 1]) {
+        edge_y = center[1] + side * opening_size[1] / 2;
+        translate([
+            center[0] - opening_size[0] / 2,
+            edge_y - (side < 0 ? rocker_tab_land : opening_overlap),
+            rocker_tab_panel_thickness
+        ])
+            cube([opening_size[0], rocker_tab_land + opening_overlap,
+                relief_depth + eps]);
+
+        hull() {
+            translate([
+                center[0] - opening_size[0] / 2,
+                edge_y + side * rocker_tab_land - (side < 0 ? strip : 0),
+                rocker_tab_panel_thickness
+            ])
+                cube([opening_size[0], strip, relief_depth + eps]);
+            translate([
+                center[0] - opening_size[0] / 2,
+                edge_y + side * (rocker_tab_land + rocker_tab_taper_length)
+                    - (side < 0 ? strip : 0),
+                lid_thickness - strip
+            ])
+                cube([opening_size[0], strip, strip + eps]);
+        }
+    }
+}
+
 module lid_artwork_nominal_2d() {
     translate(lid_art_center)
         rotate(lid_art_rotation)
@@ -983,15 +1097,15 @@ module reference_battery_and_switch() {
                     cylinder(h = battery_length, d = battery_diameter);
         color([0.08, 0.08, 0.08, 0.85])
             translate([
-                rocker_center_x - rocker_body_size[0] / 2,
-                rocker_center_y - rocker_body_size[1] / 2,
+                rocker_installed_center_x - rocker_body_size[0] / 2,
+                rocker_installed_center_y - rocker_body_size[1] / 2,
                 body_height + exploded_view - rocker_body_size[2]
             ])
                 cube(rocker_body_size);
         color([0.12, 0.12, 0.12, 0.95])
             translate([
-                rocker_center_x - rocker_cutout_size[0] / 2,
-                rocker_center_y - rocker_cutout_size[1] / 2,
+                rocker_installed_center_x - rocker_cutout_size[0] / 2,
+                rocker_installed_center_y - rocker_cutout_size[1] / 2,
                 body_height + exploded_view + lid_thickness
             ])
                 cube([rocker_cutout_size[0], rocker_cutout_size[1], 2.5]);
@@ -1049,7 +1163,7 @@ module switch_coupon() {
     coupon_height = lid_thickness;
     difference() {
         rounded_box([coupon_length, coupon_width, coupon_height], 3);
-        for (i = [0 : len(coupon_steps) - 1])
+        for (i = [0 : len(coupon_steps) - 1]) {
             translate([6 + i * spacing, coupon_width / 2, -eps])
                 centered_rounded_prism(
                     rocker_cutout_size
@@ -1057,6 +1171,11 @@ module switch_coupon() {
                     coupon_height + 2 * eps,
                     rocker_corner_radius
                 );
+            rocker_tab_reliefs(
+                [6 + i * spacing, coupon_width / 2],
+                rocker_cutout_size + [coupon_steps[i], coupon_steps[i]]
+            );
+        }
     }
 }
 
diff --git a/lib/feather_case_wizard/config.rb b/lib/feather_case_wizard/config.rb
index 37ada96..7621cb8 100644
--- a/lib/feather_case_wizard/config.rb
+++ b/lib/feather_case_wizard/config.rb
@@ -44,10 +44,15 @@ module FeatherCaseWizard
       "battery_radial_clearance" => 0.6,
       "battery_end_clearance" => 1.0,
       "battery_partition_thickness" => 1.8,
+      "battery_board_clearance" => 3.0,
       "rocker_cutout_size" => [12.9, 19.4],
       "rocker_corner_radius" => 0.8,
       "rocker_body_size" => [15.0, 21.0, 21.0],
       "rocker_artwork_gap" => 2.0,
+      "rocker_partition_offset" => 2.0,
+      "rocker_tab_panel_thickness" => 2.0,
+      "rocker_tab_land" => 2.0,
+      "rocker_tab_taper_length" => 0.6,
       "tripod_insert_enabled" => false,
       "tripod_insert_length" => 5.0,
       "tripod_insert_hole_diameter" => 7.2,
@@ -89,10 +94,10 @@ module FeatherCaseWizard
       "lid_label_size" => 5.0,
       "lid_label_logo_gap" => 2.0,
       "lid_art_margin" => 8.5,
-      "usb_opening_width" => 12.5,
-      "usb_opening_height" => 7.0,
+      "usb_opening_width" => 13.5,
+      "usb_opening_height" => 8.0,
       "usb_opening_radius" => 1.5,
-      "usb_vertical_offset" => 0.0
+      "usb_vertical_offset" => 0.5
     }.freeze
 
     ADVANCED_FIELDS = {
@@ -115,8 +120,12 @@ module FeatherCaseWizard
                             tripod_thread_clearance_diameter tripod_boss_diameter],
       "Battery and switch" => %w[battery_length battery_diameter battery_radial_clearance
                                  battery_end_clearance battery_partition_thickness
+                                 battery_board_clearance
                                  rocker_cutout_size rocker_corner_radius
-                                 rocker_body_size rocker_artwork_gap],
+                                 rocker_body_size rocker_artwork_gap
+                                 rocker_partition_offset
+                                 rocker_tab_panel_thickness rocker_tab_land
+                                 rocker_tab_taper_length],
       "USB-C opening" => %w[usb_opening_width usb_opening_height
                             usb_opening_radius usb_vertical_offset usb_connector_overhang
                             usb_guide_wall_thickness usb_guide_end_gap],
@@ -223,7 +232,7 @@ module FeatherCaseWizard
       plain_width = board_origin_y + 22.86 + p["board_side_clearance"] +
                     p["wall_thickness"]
       if p["battery_enabled"]
-        partition_y = board_origin_y + 22.86 + 1
+        partition_y = board_origin_y + 22.86 + p["battery_board_clearance"]
         battery_y = partition_y + p["battery_partition_thickness"] +
                     p["battery_radial_clearance"] + p["battery_diameter"] / 2
         lid_boss_wall_overlap = 0.6
@@ -325,6 +334,11 @@ module FeatherCaseWizard
         parameters["wall_thickness"] < 1.2
       raise ConfigError, "battery_partition_thickness must be at least 1.2 mm" if
         parameters["battery_partition_thickness"] < 1.2
+      raise ConfigError, "rocker_tab_panel_thickness must be at least 1.2 mm" if
+        parameters["rocker_tab_panel_thickness"] < 1.2
+      if parameters["rocker_tab_panel_thickness"] >= parameters["lid_thickness"]
+        raise ConfigError, "rocker_tab_panel_thickness must be less than lid_thickness"
+      end
       raise ConfigError, "lid_lip_thickness must be at least 1.2 mm" if
         parameters["lid_lip_thickness"] < 1.2
       raise ConfigError, "lid_inlay_depth must be less than lid_thickness" if
@@ -338,6 +352,7 @@ module FeatherCaseWizard
               "tripod_insert_outer_diameter must not be smaller than the pilot"
       end
 
+      validate_usb_opening!
       validate_cutouts!
       self
     end
@@ -402,6 +417,19 @@ module FeatherCaseWizard
       validate_cutout_spacing!(bounds, dims)
     end
 
+    def validate_usb_opening!
+      return unless parameters["usb_opening_enabled"]
+
+      dims = dimensions
+      bounds = usb_wall_bounds(dims)
+      if bounds["bottom"] < dims["floor"]
+        raise ConfigError, "USB opening or guide intersects the case floor"
+      end
+      if bounds["top"] > dims["lip_bottom"]
+        raise ConfigError, "USB opening or guide intersects the lid lip"
+      end
+    end
+
     def validate_cutout_spacing!(bounds, dims)
       web = parameters["cutout_min_web"]
       bounds.combination(2) do |first, second|
diff --git a/lib/feather_case_wizard/package_builder.rb b/lib/feather_case_wizard/package_builder.rb
index c1fa290..e84c227 100644
--- a/lib/feather_case_wizard/package_builder.rb
+++ b/lib/feather_case_wizard/package_builder.rb
@@ -225,7 +225,7 @@ module FeatherCaseWizard
         plate, and slicing settings in Bambu Studio.
         #{artwork}
       MARKDOWN
-      File.write(stage.join("README.md"), text)
+      File.write(stage.join("README.md"), text.rstrip + "\n")
     end
 
     def install_atomically(stage, destination)
diff --git a/test/config_test.rb b/test/config_test.rb
index 3b1c129..5aaa3b5 100644
--- a/test/config_test.rb
+++ b/test/config_test.rb
@@ -72,6 +72,26 @@ class ConfigTest < Minitest::Test
     assert_match(/guide requires/, error.message)
   end
 
+  def test_usb_opening_expands_upward_without_moving_bottom_edge
+    parameters = config.parameters
+    compensation = parameters["hole_compensation"]
+    board_top = config.dimensions["floor"] +
+                parameters["board_bottom_clearance"] + 1.6
+    old_center = board_top + 1.6
+    old_width = 12.5 + compensation
+    old_height = 7.0 + compensation
+    new_center = old_center + parameters["usb_vertical_offset"]
+    new_width = parameters["usb_opening_width"] + compensation
+    new_height = parameters["usb_opening_height"] + compensation
+
+    assert_in_delta 1.0, new_width - old_width, 0.001
+    assert_in_delta old_center - old_height / 2,
+                    new_center - new_height / 2, 0.001
+    assert_in_delta 1.0,
+                    (new_center + new_height / 2) -
+                    (old_center + old_height / 2), 0.001
+  end
+
   def test_end_clearances_expand_case_length
     subject = config
     subject.parameters["usb_board_wall_gap"] = 20.0
@@ -109,6 +129,19 @@ class ConfigTest < Minitest::Test
     refute_includes source, "bore_d = diameter + hole_compensation;"
   end
 
+  def test_lid_rocker_mirrors_to_installed_feather_side
+    source = FeatherCaseWizard::MODEL_SOURCE.read
+
+    assert_includes source,
+                    "rocker_lid_center_y = case_width - rocker_installed_center_y;"
+    assert_includes source,
+                    "translate([rocker_lid_center_x, rocker_lid_center_y, -eps])"
+    assert_includes source,
+                    "rocker_installed_center_y - rocker_body_size[1] / 2"
+    assert_includes source,
+                    "+ rocker_body_size[1] / 2 + rocker_partition_offset;"
+  end
+
   def test_oled_buttons_and_selected_coupons_are_printable
     subject = config
     subject.parameters["top_profile"] = "oled128x64"
@@ -125,10 +158,50 @@ class ConfigTest < Minitest::Test
     subject.parameters["tripod_insert_enabled"] = true
 
     assert_in_delta 88.6, subject.dimensions["length"], 0.01
-    assert_in_delta 59.06, subject.dimensions["width"], 0.01
+    assert_in_delta 61.06, subject.dimensions["width"], 0.01
     assert_in_delta 31.25, subject.dimensions["height"], 0.01
   end
 
+  def test_battery_board_clearance_moves_the_whole_bay_outward
+    subject = config
+    subject.parameters["battery_enabled"] = true
+    original_width = subject.dimensions["width"]
+
+    subject.parameters["battery_board_clearance"] += 2.0
+
+    assert_in_delta 2.0, subject.dimensions["width"] - original_width, 0.001
+  end
+
+  def test_switch_tab_relief_uses_two_mm_lands_in_lid_and_coupon
+    source = FeatherCaseWizard::MODEL_SOURCE.read
+
+    assert_in_delta 2.0, config.parameters["rocker_tab_panel_thickness"], 0.001
+    assert_in_delta 2.0, config.parameters["rocker_tab_land"], 0.001
+    assert_includes source, "module rocker_tab_reliefs(center, opening_size)"
+    assert_equal 2, source.scan(/rocker_tab_reliefs\(/).length - 1
+    assert_includes source,
+                    "edge_y = center[1] + side * opening_size[1] / 2;"
+    assert_includes source,
+                    "opening_overlap = rocker_corner_radius;"
+    assert_includes source,
+                    "cube([opening_size[0], rocker_tab_land + opening_overlap,"
+    refute_includes source,
+                    "edge_x = center[0] + side * opening_size[0] / 2;"
+  end
+
+  def test_switch_moves_two_mm_toward_partition_on_installed_lid
+    assert_in_delta 2.0, config.parameters["rocker_partition_offset"], 0.001
+  end
+
+  def test_switch_tab_panel_must_be_thinner_than_lid
+    subject = config
+    subject.parameters["rocker_tab_panel_thickness"] =
+      subject.parameters["lid_thickness"]
+
+    error = assert_raises(FeatherCaseWizard::ConfigError) { subject.validate! }
+    assert_match(/rocker_tab_panel_thickness/, error.message)
+  end
+
   def test_legacy_round_switch_fields_migrate_to_rocker_defaults
     data = config.data
     data["parameters"]["switch_hole_diameter"] = 12.0
@@ -232,7 +305,7 @@ class ConfigTest < Minitest::Test
 
   def test_front_cutout_can_clear_usb_reservation
     subject = config
-    subject.data["cutouts"] = [cutout("front", 10.0).merge("z" => 11.0)]
+    subject.data["cutouts"] = [cutout("front", 8.0).merge("z" => 11.0)]
 
     assert_same subject, subject.validate!
   end
diff --git a/test/package_builder_test.rb b/test/package_builder_test.rb
index 7febef5..ff8201b 100644
--- a/test/package_builder_test.rb
+++ b/test/package_builder_test.rb
@@ -29,6 +29,7 @@ class PackageBuilderTest < Minitest::Test
       %w[iso front back left right top].each do |view|
         assert destination.join("previews/assembly_#{view}.png").file?
       end
+      refute_match(/\n\n\z/, destination.join("README.md").read)
 
       config.parameters["button_reset"] = true
       build(config, root.join("cases"), tools, model, renderer)