Toss in that Atari populated the boards to specific games. You will not be able to pull a board from a superman and get it to work in a hercules.

John is a great guy and an amazing wealth of knowledge. I still owe him for the hour and a half long masters class he gave me on troubleshooting GI issues earlier this year. It came down to a roll pin that had fallen out of the head on a sling shot and welded itself inside a lamp socket.

It was amazing to watch. He started at the board looking for shorts or low resistance between pins and then moved to the underside of the playfield when he had it narrowed down to a couple of runs. He went through each leg of the run disconnecting them to isolate segments until he found the one with the short and then went from socket to socket until he found the one with the short. It sounds simple once the process has been described but I would never have gotten there on my own. He even helped resolder all of the connections he had undone.