This has been posted elsewhere, and you may have already seen it, but I have spent a bit of time looking through it recently and it has a lot of great game specific info.
http://www.pinballninja.com/Clay has been busy repairing games he is trying to repair 500 in 365 days.
The search magnifing glass does not work you just had to press enter after you type the name of the game you are looking for.
Hours of reading with some really fantastic stuff
