One Piece Spool Roller

I was tired of various designs of spool holders failing or being generally annoying because they were two pieces joined together so I made a one piece spool holder.

You'll have to print the bearing guides first (4 off) and press them onto the bearings. They are designed to be a tight fit on 608ZZ bearings, some of them I could press on with my hands, the others I had to tap with a hammer.

Next print the spool holders (2 off) making sure to leave clearance for the bearings to go on (yes I