- [slotwidth * sqrt(2), 0],
- [slotplugdepth / sqrt(2) + slotwidth * sqrt(2),
- -slotplugdepth],
- [slotplugdepth / sqrt(2), -slotplugdepth]]);
+ [slotwidthx, 0],
+ [slotwidthx + slotplugshorterlen * slotxperlen,
+ -slotplugshorterlen * slotyperlen],
+ [slotpluglongerlen * slotxperlen,
+ -slotpluglongerlen * slotyperlen]]);
+ translate([-1,
+ -rearwallthick - boltholeslotshorter + 0.2,
+ tubedia + tubetubetopslop + tubetubethick + 4])
+ cube([keepslotx - keepslotclear + 1,
+ boltholeslotshorter + 0.5,
+ rearwallstrengthwidth]);