I have a question regarding a changeover issue with the 42054 Class tractor set. In the rear of the set is the crane grabber unit with 2 levers/changeovers. With my model, the right lever (facing the rear/crane) seems to activate the mechanism even while in neutral. Has this happened to anyone else? Does anyone have a suggestion for a new(ish) Technic builder to correct it? I took the unit off and played with the mechanism for a bit, but cannot tell what the cause might be.