- translate([-body_h/4, 0, -eps])
- cube([body_h/2, bar_diam/2+wall/2, eps]);
- translate([-spike_w/2, 0, -body_h/2])
- cube([spike_w, bar_diam/2 + wall + spike_l, eps]);
+ translate([-spike_w_top/2, 0, body_h/2-eps])
+ cube([spike_w_top, bar_diam/2+wall/2, eps]);
+ translate([-spike_w_bot/2, 0, -body_h/2])
+ cube([spike_w_bot, bar_diam/2 + wall + spike_l, eps]);