Simple Prusa i3 Filament Spool Holder. (Makerbot 2kg spools)

This is a very simple but reliable filament holder for prusa i3, makerbot spools. I know this is pretty specific, but I thought I would at least share the idea so others can make their own for their particular spools.

Notes:
Ultra-fast spool changing, Takes seconds!
Only 2 small pieces to print
Requires only 1 piece of additional hardware: 1 608 bearing

Instructions:
1. Print both pieces.
> I had to print the bearing holder @ 102% size to get the fit I wanted but my printer was havin