I did test to make sure the motor would move. What I had to do was use a piece of steel with two holes as a tool to hold my dremel in the proper spot. I used a screw and nut in one end of the steel and went thru on the bottom hole in my mount and then used the top hole for the proper arc. Drilled three holes first using the steel tool as the guide. Then dremeled out the arcing slot. Only trouble I had was the nut I used on my screw should have been a nylon lock nut because it came loose and I ended up with a fat spot. I think you can see it in the picture.