Spool Holder

# Spool Holder

Works for 1kg and 2.5kg spools. Maybe other, too (not tested).

Uses four 9x20x6 ball bearings. Since it's customizable, you can make it fit your favourite BBs.

## Printing
- print 4 rails
- print 4 wheels
- print 4 rings

## Assembly
- Insert BB into wheel, use ring to keep it in place. Maybe add a drop of CA (I didn't - it fits snugly)
- repeat 4 times :)
- use four 12mm M3 screws to assemble