use // SpoolMount removable side (i.e. attached to spool holder or cage) module spoolmount_b() { difference() { spoolmount(); // Holes for (a = [0 : 30 : 330]) { rotate([0, 0, a]) translate([29.75, 0, 0]) { // Center through hole translate([3.25, 0, 3]) cube([6.5, 8, 7], center=true); // Diagonal sides translate([3.25, 0, 4]) rotate([45, 0, 0]) cube([6.5, sqrt(72), sqrt(72)], center=true); // Flat top cutout translate([3.25, 0, 5]) cube([6.5, 12, 2], center=true); } } } } spoolmount_b();