cover_registration_c_dy = -cover_strap_c_d_y - strap_w/2
- side_wall_th - cover_registration_sz_y/2;
+midbot_registration_sz_y = cover_registration_sz_y;
+midbot_registration_y_min = total_y_min + side_wall_th*2;
+midbot_registration_y_max = midbot_registration_y_min
+ + midbot_registration_sz_y;
+midbot_registration_y_around_max = midbot_registration_y_max
+ + side_wall_th*2;
+
module BothSides(){
for (m=[0,1]) {
mirror([m,0,0]) {