Spool Roller with Bearings for Ikea Lack Enclosure

Here's a spool roller I designed to go with the Ikea Lack enclosure. It's based off of the design included in the [Original Prusa i3 MK3 ENCLOSURE -Ikea Lack table - Prusa Research](https://www.thingiverse.com/thing:2864118) from cisardom, but (1) resized to fit the ~70mm wide Prusament rolls and (2) modified to fit some bearings I had on hand.

Notes:
1. The BearingPins are designed for bearings with a 12mm inner bore - 12mm x 21mm x 5mm [like this](https://www.mcmaster.com/5972k212).
2. B