Shelf-mount hanging spool holder

A filament spool hanger designed to mount on the edge of a shelf - it can be used just to store your filament, or if the shelf is close by you can feed your printer directly from the spools where they hang. I wanted to keep it simple, flexible, and 100% printable - no metal parts are required (bearings, rods, etc.). But if you want to combine some metal parts into your implementation these hangers will work with that too. The STLs included here are sized to fit the shelf above my printer, but the design is fully parametric so you can use the Thingiverse Customizer to fit them to whatever size shelf and spools you happen to have, within the limits of your printer of course.

There are 5 separate components all potentially generated from the single design - I recommend letting the customizer generate all of the ones you need together to ensure they are all compatible, and then using your slicing software to separate them for making multiple copies of some, or printing different parts