Now to add a motor. Most of these parts are NOT part of the kit. 1/4″ bore MXL Pulley (SDP-SI #A 6T16-018DF2508, $5.81/ea, beware of shipping), M5x.8-40mm cap screws (McMaster #91303A099), M5 washers (McMaster #98269A440), M5 locknuts (Mcmaster #90576A104), M5x25mm aluminum spacers (McMaster #94669A093). To attach a NEMA23 motor. The Idlers are standard.