The file 'Wheel Balancer For Fifth Scale RC 3D Printer Model' is (stl,FCStd) file type, size is 520.3KB.
Print on it's side, no supports needed.
Uses two 12x24x6 bearings and wheel hub from HPI Baja 5B front wheel (but maybe some other hub would work).
Remove bearings seal and degrease them for best result.
