Standard Crown

Tube end and motor end interfacing part. Rotates with the tube and the motor crown notch to measure rotations. There is an indent for the Velcro attachment point, so make sure it is properly aligned. The tube fit is very tight and removal will be difficult. If you are replacing because of a motor failure, firmly bump the drive end of the motor against the base of the crown to get the removal started. Crown only goes into the tube in one orientation, so check velcro alignment notch!