- README: describe mechanical stacking and the function of the various
protective layers
- cvr.py: model of the cover sheet, with gnuplot and HeeksCAD output
- "tongue" of battery lid hits the counterweight. Open a 1.5 mm deep bay for
it.
- inclined area was too steep. Make it reach the upper plateau 0.5 mm later.
- run protrusions on "podium" at the battery 0.5 mm closer to the battery
- extend left "ear" 0.5 mm into available space
