- translate([body_l/2+hook_hole, body_w/2-hook_w-hook_hole, 0])
- cube([hook_w, 2*hook_hole+2*hook_w, wall]);
- translate([body_l/2, body_w/2+hook_hole, 0])
- cube([hook_w+hook_hole, hook_w, wall]);
+ translate([body_l/2+hook_hole, body_w/2-hook_w-hook_l, 0])
+ cube([hook_w, hook_l+hook_hole+2*hook_w, wall]);
+ translate([body_l/2+hook_hole-hook_l, body_w/2+hook_hole, 0])
+ cube([hook_w+hook_l, hook_w, wall]);