Spool Roller

This is just an addon / mod to the already excellent TUSH - The Ultimate Spool Holder.

https://www.thingiverse.com/thing:2047554

Print 2 of the original sides, press on the bearings, print 2 of the tubes, choose between 68mm and 78mm, they fit snugly over the outside of the bearings. There are inner stops to prevent the bearings going in to far.