bolt_above = 8.50 - 0.50;
bolthole_height = 4.24 + 1.00;
wall_thick = 4.50;
-bolthole_width = 16.62 + 2.00;
-main_sz = 150.56 + 0.75;
+bolthole_width = 16.62 + 1.00;
+main_sz = 149.06 + 0.50;
cnr_rad = 13.5; // approx
lidinner_thick_allow = 20.78 + 0.50;
display_width = 69.81 - 0.50;