I think this is the same issue I am seeing, any luck figuring out what it was...
I just picked up an Aerosmith Pro that has 700 total plays on it and I am seeing issues where the lift in the toybox every 3-4 games will get wedged or stuck in the 3/4 up position, if you manually assist the motor it will go all the way down. Coming up doesn't seem to be an issue, is there some kind of alignment that I can adjust or a way to keep it from getting stuck in the middle of the cycle? Anybody else have this issue?