Case: 12 inserts, M3x6 for the display

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

case/README.md

@@ -27,13 +27,13 @@ works if the case stays out of the sun.
 
 ## Hardware
 
-- 10 × M3 heat-set inserts (about 4.6 mm OD, 5.7 mm long; the holes are 4.0 mm
+- 12 × M3 heat-set inserts (about 4.6 mm OD, 5.7 mm long; the holes are 4.0 mm
   and 6 mm deep):
   - 4 in the bezel's display bosses
   - 2 in the bezel's feet
   - 2 in the body's rear corners
   - 4 on the base's board standoffs
-- 4 × M3×8 to bolt the display to the bezel
+- 4 × M3×6 to bolt the display to the bezel
 - 4 × M3×6 to hold the D1 board on its standoffs
 - 4 × M3×8 to hold the base on, from below; **M3×10** with the TPU feet