Hanging Spool Holder

UPDATE: Added a bit more play to the rollers. Added a cap to the bearing stud to hold bearings in place. Look for the V2 roller and stud files to make this change.

I couldn't find a spool holder that met the requirements for exactly what I was looking for, so I designed my own. Three of the main requirements I was looking for are as follows:

1. Vertical hanging to mount inside my enclosure (rather than on top) and remove the weight from my printer frame.
2. Uses some form of roller or bea