jig_max_y = max(holder_max_y + main_slop, strap_width/2) + edgewall_width;
jig_min_y = min(holder_all_min_y - main_slop, -strap_width/2) - edgewall_width;
jig_max_y = max(holder_max_y + main_slop, strap_width/2) + edgewall_width;
jig_min_y = min(holder_all_min_y - main_slop, -strap_width/2) - edgewall_width;