RackRoller: Alien3D Remix of Open Source Flange Roller Add-on For RepBox 2.3.1+ and RepRack System

I wanted rollers where the bearings were a bit wider apart as I had a spool pull off when they're closer together, also doubled them up for spools next to each other on the RepRack to feed the Palette. I used 8x20mm metal pins (Amazon aff link) and it's all 1 piece that they just slide in to.