I looked for this thread because this is the only thread I know where it mentions many board repair services. I wanted to add that I recently used Hans @ Siegecraft and he did a great job. He kept me in the loop and didn't take long working on my sound board for my Gorgar. Very good experience.
He is pinsider: HHaase
http://pinside.com/pinball/community/pinsiders/hhaase
-Rev