Bearing jacks

This model is used in conjunction with the A1 mini base designed to allow filament spools below the mini. Four units are placed within the legs of the base to allow the spool to turn more easily. After slicing the model, place a pause at level 84 to allow you to drop in bearings (either metal or printed plastic). Some spools have ridges limited free rolling of the bearings. (see sample photo) If you have this problem either interpose a repurposed filament box cut out to match a filament spool or print a beheaded Bambu spool (.stl attached) and use it to have a smooth rolling surface for the bearings.