Simple way to hold 608 bearings to roll a spool on a Rostock Max V2. Uses 2 prints, 2 bearings, 2 zip ties, 1 shaft "pencil/bolt/rod", and the stock spool holding arm from the kit. Spool rolls on top of the shaft, which rolls on the bearings. No cutting or drilling needed. Fit from the bottom of the arm, slide bearing in the top, pull the zip ties tight with pliers to get a good fit. Outer edge of the bearing rests on the top of spool holder arm.