tweak the fit of the parts

README.md

@@ -28,15 +28,15 @@ print, or rebuild an existing case. Generated definitions live under
 `cases/<name>/`; exports, previews, revision history, and `vendor/bundle` are
 ignored by Git.
 
-OpenSCAD and Blender must be available on `PATH`. On Ubuntu:
+OpenSCAD, Blender, and Python 3 must be available on `PATH`. On Ubuntu:
 
 ```bash
-sudo apt-get install openscad blender
+sudo apt-get install openscad blender python3
 ```
 
-Set `OPENSCAD=/path/to/openscad` or `BLENDER=/path/to/blender` when either
-program is installed elsewhere. The wizard checks both tools before replacing
-an existing package.
+Set `OPENSCAD=/path/to/openscad`, `BLENDER=/path/to/blender`, or
+`PYTHON=/path/to/python3` when a program is installed elsewhere. The wizard
+checks all three tools before replacing an existing package.
 
 The wizard can add clearance beyond either short end of the Feather PCB for
 right-angle headers, plug housings, and wire bends. Front clearance moves the
@@ -132,6 +132,25 @@ remains based on the taller switches plus `oled_face_gap`, placing the display
 face about 1.7 mm below the lid's inner plane. The default 0.7 mm captive-button
 contact extension spans most of the 0.8 mm switch-to-lid gap.
 
+When the battery compartment and tripod insert are both enabled, the generator
+adds board-side clearance to keep the insert centered across the case width and
+moves it 5 mm toward the USB wall to clear the nearest Feather standoff. The
+battery partition defaults to three 0.6 mm extrusion lines and can be adjusted
+with `battery_partition_thickness`.
+
+## Two-color lid artwork
+
+Set `lid_label` to a device name and/or enable `lid_logo_enabled` to add flush
+second-color artwork to non-OLED lids. Choose `lid_art_orientation` from
+`usb_left`, `usb_front`, `usb_right`, or `usb_rear`; it describes where the USB
+edge sits when the exterior artwork is upright. OLED profiles reject lid
+artwork until a window/button-safe layout is defined.
+
+Generated artwork packages include separate `lid_base` and `lid_accent` meshes,
+a complete single-color `lid`, and `lid_multicolor.3mf`. The multicolor file is
+one aligned multipart object with its base assigned to filament 1 and its logo
+and title assigned to filament 2. Print the lid exterior-face-down.
+
 ## Custom wire egress
 
 `extra_cutouts` accepts any number of entries:
@@ -164,9 +183,11 @@ points.
 1. Export and print `part="insert_coupon"` in the intended material.
 2. Test both M2.5 and 1/4-20 inserts in the five stepped holes.
 3. Set `m25_insert_hole_diameter` and `tripod_insert_hole_diameter` to the best
-   coupon values.
-4. Print `part="switch_coupon"` and choose the best hole for the actual DMWD
-   switch batch.
+   coupon values. These parameters are the finished pilot diameters in the
+   model; `hole_compensation` is not added to heat-set pockets. The coupon uses
+   the same tapered pocket geometry as the cases.
+4. Print `part="switch_coupon"` and choose the best rounded-rectangle opening
+   for the actual KCD1-101 rocker-switch batch.
 5. Print `part="fit_coupon"` and tune `fit_clearance` before committing to the
    complete lid and body.
 
@@ -180,13 +201,16 @@ temperature control, and the same extrusion settings intended for the case.
    opening faces the exterior bottom.
 2. Heat-set four M2.5 inserts into the board standoffs.
 3. Fasten the ESP32 Feather V2, then install the stacking headers and Wings.
-4. For battery builds, place the protected 69 x 18 mm pack in the cradle, route
-   its lead through the partition notch, and mount the latching switch in the
-   battery-side wall.
-5. Heat-set the four lid inserts downward into the corner bosses.
-6. For OLED builds, insert each enabled printed plunger through the lid from
+4. For battery builds, place the protected 69 x 18 mm pack in the cradle and
+   route its lead through the combined front partition/JST opening and beneath
+   the Feather PCB.
+5. Snap the KCD1-101 rocker switch into the rear lid opening, connect its bent
+   quick-connect terminals or low-profile wiring, and lower the wired lid onto
+   the case.
+6. Heat-set the four lid inserts downward into the corner bosses.
+7. For OLED builds, insert each enabled printed plunger through the lid from
    the inside. The elongated flange stays in the internal recess.
-7. Engage the lid rim and fasten four standard M2.5 socket-head screws into the
+8. Engage the lid rim and fasten four standard M2.5 socket-head screws into the
    2.5 mm-deep counterbores.
 
 Confirm the USB plug, switch, battery, insert, and lid fits without force before