So what i had to do was take my dremmel and grind the part of the switch base below the threads down to allow the threads to screw further into the transmition. (mechanics.stackexchange.com)
My local «dog - wash» does toe nail clipping with a dremmel tool. (thriftyfun.com)
It's worth a try and even if you don't like it for doing their nails, you'll find 101 good uses for a dremmel around the house. (thriftyfun.com)