Oh oh. I'm definitely missing parts. I don't have the plate that is sitting on the arm with the 2 nubs on it. My cam must be totally worn out as there is no half moon on it either. It also doesn't have the internal plastic piece and my spring must be stuck to the motor shaft as it doesn't budge. The kit I ordered doesn't come with the metal plate so I guess I'll have to go looking for parts. Thanks Plumcrazy!