24 halfway = (front_fullsz + main_sz)/2;
27 [front_fullsz, main_sz],
28 [main_sz, front_fullsz],
33 sqmid = main_sz * sqrt(0.5);
34 prlen = back_tot_l - sqmid;
35 prx = 0.5*back_cut_w + back_prong_w;
39 rotate(-45) translate([-prx, sqmid])
40 square([prx*2,prlen]);
42 rotate(-45) translate([-back_cut_w/2, back_tot_l-back_cut_l])
43 square([back_cut_w, back_cut_l+1]);