For anyone pulling off upper playfield:
- a few (3?) Machine screws holding playfield down vertically. One you can't get to with mini playfield ramp installed, suggest pulling off bowling alley facade and then the remaining metal braketry which includes the metal ramp running over the car. I dicked around too long trying get just the plastic ramp removed.
- two wood screws from back wall through horizontal into upper playfield
- flipper, and car assembly themselves pass through, the car was a bitch to put back on, because if it's too high it hits metal ramp above the car. I had to open up some margin with the stepper mount itself to get it to work(could also dick with coupler ). You need 11mm wrench for the coupler and 12mm for nut.
- Walter ramp removed, at least top half. Entirely removing hells with reinstall.
Once you get it loose, you have a ribbon cable and two optos. I pulled ribbon cable and unscrewed optos. The other sides are buried in cable management so not east to disconnect from bottom.
Now, you have the big blue plastic over bowling alley. This part is easy but huge warning that bit me.. you can very easily overtighten the blue plastic which creates way too much friction between it and the red one that needs to slide freely under neath I was able to loosen it up enough without pulling it all apart again but there's still back corner with a screw head that's too tight.. but working ok.
All back together. The hardest part, for me, was the car coupler, and my "road not traveled" disassembly.