Bulldog:

I just did a quick check on flights from SFO to Oklahoma City for next weekend. They run about $400 round trip (you can probably get a cheaper flight out of Oakland - San Jose has flights in the $280 range).

As most of the guys here have said, JJ is the point man for final decisions about the mechanical soundness of double rifles. For a $20K DR, I think a $300/$400 airline ticket is cheap - this way you can go to the shop, spend time with George and JJ, and probably shoot the rifle in their presence. Walking into a store with cash in hand and being able to negotiate a final price is A LOT better than doing so over the phone or via email - at least in my experience.
JMHO

Good luck with your decision.