OP here - I'm in the Pittsburgh area and haven't dealt with any local luthiers. I'm sure there must be a few around but I'm not sure there would be a Martin specialist. Pittsburgh isn't that huge a city. Would you think it's worth going further afield to find somebody that knows more about the specific brand? From what I've heard Martin is sort of the Fender of acoustics.
Dan Erlewine is in Athens, Ohio. From what I've seen of him on the web I think he'd be worth checking out for the Martin.