cnr_rad = 13.5; // approx
lidinner_thick_allow = 20.78 + 0.50;
+dpp3 = [ -5.5, 8.5 ];
+dpp2 = [ -11.0, 7.0 ];
+dpp1 = [ -34.0, 14.0 ];
+
// other parameters
web_thick = 4;
web_height = 20; // excluding wall and base thick
thumbslot_depth = 5.0;
thumbslot_width = 15.0;
thumbslot_between = 10;
+dcover_endthick = 3.0;
+dcover_mainthick = 5.0;
+dcover_slop_height = 0.25;
+dcover_slop_depth = 0.25;
+dcover_slop_inside = 1.25;
// ----- calculated -----