Quoted from popeboy:
Actually I just looked at it again last night. The hole on the top of the backbox that it mounts to is about 4" in diameter (just guessing, didn't actually measure it), I was thinking I could just buy the right size hole saw and pop a hole in the little shelf, screw it to the bottom of that like it is mounted in the machine. The motor itself is enclosed and pretty small.
Update on my double kick out issue with multiball. Ran the switch test last night and no stuck switches. Ran the switch edge test and hand tested all the switches, they all registered properly.
I locked a ball in the kick out hole instead of a hideout and that started a 2 ball multiball properly. Only seems to be an issue if I lock a ball in the hideout to start multiball. Then it kicks out the first in to the shooter lane, waits about a second (which is enough time to launch the first ball if you are quick), then kicks a second ball in to the shooter lane.
Again I am assuming this is not the normal function since I am new to this machine.
Test the switches with a ball, not your hand. I'm still guessing you have a flakey switch in the hideout or the trough.