Richard, if you can describe to me a "disposition of bridge plates and struts" that makes it impossible to fit a Bridge Doctor, I will apologise unreservedly for any perceived curmudgeonry. I can visualise no such disposition.

If the guitar in question has normal bridge-pin holes ala Martin, there will be no problem. If it is an experimental instrument with a pinless bridge and an experimental bracing system, then it might require some ingenuity on the part of the luthier, but if he can't figure out the way round it, he shouldn't be in the game.

As I said earlier, I can see no reason why the repairman (which is what I assume leeneia meant when talking about the "owner") should ask a customer to examine the braces.