Got the '37 running pretty good but am seeing sparks in the cut-off mounted on top of the 6 volt generator. The base is bolted to the the generator so it's grounded. The top part of the cut-off is a little loose and sparks between it's lower edge and the base. Should there be an insulator between those two pieces or should the whole thing be insulated from the generator case? Don't want to burn the thing down. Thanks John
