Seems like every time I work on drop targets on a Williams solid state game the screw holes for the screws that hold the little pc boards in place are stripped. Usually I just use Loctite on the screws and hope for the best, or maybe try a slightly larger sheet metal screw. Since the plastic drop target guides are unavailable that's the best I could come up with. I had to re-think that approach with an Alien Poker that I'm working on. The screw holes weren't stripped, they were mostly completely missing, the plastic studs were broken off. I removed the drop target guides, drilled through them, and inserted 5-40 screws from the back. Used plastic sleeves as spacers, then 5-40 nuts to hold the pc boards in place. So far everything is working.