When I finally got around to putting the guts of Tron back into the cabinet, everything worked well except for the spinner control. Tron's arm would swing around normally until it hit a certain position, then it would 'jump' to a few positions ahead of where it should be. The problem ended up being a bad LS244(buffer) at position E2 on the Super Sound I/O PCB. It's purpose in life is to receive the encoder signals from the spinner control and then dump them onto the data bus.
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