My switch has gone bad, when I just barely touch it the speed will jump several hundred RPM's. And I cant get it to run below 400 RPM's at all now. I went to the dealer and a new switch was $620!! This is a backup combine and I hate to spend that much on a switch. Was wondering if there are any other sources to get one through or if there is a different switch used to update to a constant speed rotor and the cost was not that much more would that be the way to go?