On one of the stepper units ( the last one I worked on)! There was one screw on one of the coils that just refused to move. Someone must’ve cross threaded it I think coz it was only half screwed in. and the slots were all burred up which didn’t help! At this point I thought some heat might help it move so out came my little Butane gas torch, this was something I bought from Dick Smith a year ago and have never used until now!! well it seemed to do the trick (1st pic)… that and a pair of side cutters on the screw to turn it and it came out with not too much effort. Some replacement screws were found on an old Wms Superstar playfield I have here using for parts.

The stepper disc on the last unit (2nd pic) was still in good nick so I simply sanded the traces smooth with some 400 wet/dry sandpaper and refitted the wiper arm. Last two pics show the repaired steppers with the new boards.

all i need to do now is replace one  stepper disc on the bottom panel relay board, and i'll put the pf and relay board back in the game and see if it works!!after that i'll clean and adjust score reels/relays etc and get it all up and running before i pull it all down again for a full restore