Ender 3 Spool Holder with Bearings

Spool holder using 3 608 bearings (cheap skateboard / fidget spinner bearings) to allow less resistance on the extruder. Uses the existing nut and upstand from the original spool holder. After some testing this works great although on some occasions the reel moves too easily and un spools slightly. Not a major problem. I solved this by adding small strips of cardboard inside the bearing slots to add a small amount of resistance. I'm currently working on a version with some sort of built in resistance adjustment - stay tuned