drill the round lock the same way starting in the center of the lock ... may need to start with smaller bits and work your way up, but eventually you'll get there.

that is serious armor plating. They must have been operated in a war zone

do what ya normally do for an EM game wrt checking steppers, cleaning off contact plates, operating relays to check switch gaps, and cleaning the jones plug pins.

manually release the cams on the control unit and spin the cams by hand to make sure the the clutches aren't gummed up, and do similar to the mixer rotors on the top of the back door.

manual and schem in the cabinet? If not, download them from http://bingo.cdyn.com/

you have the score extra step pulse generator on the mixer shaft, but no score extra step index unit or relay. It's not a big deal, but if you want to make that work again I should be able to scrounge those parts for you. You'd want to check the wiring is still in the harness where they used electrical tape at the top of the back door.

the plastic coated wires outside the main harnesses are a the first clue on the jackpot unit, assuming they go there. Green wires to a 16 pulse cam switch, probably to remove the jackpot credits.

huh. A standard replay register and it's not even using all the switch on the SPDT switch on the left.

for people who don't remember (like me), the register step up coil is on the top/right, and the step down is bottom/left.

if you need help figuring out the schematic/logic, going to need to know where all the wire are going inside the main game. The pics in the first post aren't high enough resolution to see, so either max res or closer shots are needed (without being so close don't know what device the wire is connected to).

if you are hitting size limits to post here, you can email pics to [email protected] and I'll try and scale/resize them