Quoted from Frax:Necro bump with a relevant question...
Anyone ever seen screws with diamond shaped heads that go all the way through the bushing and are screwed into the playfield wood!?! This HAD to be a field hack...am down to replacing the flipper mechs on Shuttle's backside and noticed these two screws I can't easily remove because they require basically a square peg bit.....
Odd. As. Heck.
Can you post a picture? From your description I can't tell if it's a square headed bolt, a square drive screw, or a diamond shaped something else.