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 made that mistake). Turn off supports or you'll never get the bearings in. I found it was best to print them so that the bottoms are facing each other. You'll need to put a pause in the g-code, I also put code in to move the head away from the print just before the pause. For me the pause was at layer 54 but your mileage may vary. When the print pauses place the bearings on, again, a fairly right fit, just press until they bottom out, and hit continue.

The tray is optional, but recommended. T