I have an older Spectrum DD40. One of the plastic pieces that connects the drive shaft and the gear shaft is slipping on the gear shaft. The parts department does not seem to carry that piece. Does anyone have any idea about how to repair or replace that piece. I have tried using a small amount of various glues, but that does not last long. In my opinion that part seems prone to failure since it is thin plastic and it only depends on friction to stick to the gear shaft.