NBM,
Dave Dunbar is your guy. We used him, and will continue to use him, and have only positive things to say. From initial filing, which he had us through in record time to ongoing consulting, opinion, and Q&A. Dave's a regular contributor here, and as far as I'm concerned, is the go-to-guy for all TTB related matters. I wouldn't use anyone else. His time has been one of our best investments, by far.