The Zen of the Nails.

[Vikingwiz]

I can't say I've personally ever received a game where the whole board is out of wack. If anything, I would use a nail bending tool to just slightly bend the center pocket pins out slightly to reduce the time needed to reach a fever.

If you want it to go back to stock, you'll need the service manual to know what stock positioning is or alternatively, pursue trial and error based on your objective. I've attached an image for reference on what service manuals provide for pin configuration.

NailPositioning.JPG