Iain made an aweseome model that was a perfect design. I wanted to adapt it to hold two empty spools and attach to a new wood AMS riser I built for my workbench (got the 2nd AMS on the Anniversary sale!) easily holds two spools. I just cut a middle part out in the slicer, dipulicated it and extended it to fit two. You can see from one of the pics, it can actually hold three if the 3rd is hung on the lip side of the spool. Would likely only hang one full spool. Attached with #6 ¾" screws.