Spool storage system for IKEA BILLY

Spool storage system for IKEA BILLY. In my version, I used 22mm wooden rods and standard dowels for mounting the shelves. The model is parameterized and allows for changing the rod diameter and mounting screw/dowel spacing. A standard shelving unit with an internal width of 76cm can store up to 11 1kg spools or more smaller ones. The spacing between the rod axes is 14cm.