// -*- C -*-
-main_sz = 20; //xxx
+main_sz = 22.5;
wall_th = 3;
-front_fullsz = 10; //xxx
+front_fullsz = 10;
front_th = 2;
+gap_th = 9.5 + 0.5;
back_th = 4;
-gap_th = 5; //xxx
-back_tot_l = 30; //xxx
+back_tot_l = 32.5;
back_cut_l = 4;
-back_cut_w = 10; //xxx
+back_cut_w = 13;
back_prong_w = 3;
back_hole_d = 2;
back_hole_dia = 1 + 0.5;