Triangle Spool Holder
I needed a spool holder that was able to hold a spool vertically and accommodate various sizes so I designed this. There is a slot to thread the plastic through to direct it down as well. The spool in the picture is 8 inches in diameter, although I've been having some issues with size so I had to do some scaling before I sliced, I think the STL is 1/10 scale if you want it to be that size.