guy I am earnestly flattered, Thank you. Little Big Man what Rod and Simon said is very sound advice Though it is Steve Kinnard, Johns brother that lives in east Texas. A fabulous Luthier. Notice the capital "L" in luthier. Seriously though check out many luthiers. Call them and talk to them for a bit. Get a feel for the person. understand how they work. Some build specif models with specific features, Some like me will do darn near anything you want as long as it does not compromise the instrument. Some of us can turn an instrument around in a short time spans, some of us have back logs. Some of us are still cutting our teeth as far as commission building is concerned Some of us are truly worthy of the earned title Mater Luther, though none will likely profess to it.
Things to look out for is track record but don't discount newer builder solely on their time in the craft. Often you can get an excellent instrument for a fraction of the cost that the more experienced builder would require. That said experience is still golden in this craft. but also understand that you pay for experience.
Look out for a builder that does not ask a lot of questions of you. knowing what a perspective client is looking for is hard to determine from an order form. knowing the style of you play and the type of music and settings you play in is likely to give the luthier clues as to what woods, body styles and set ups to use.
It is a vastly different thing to commission a hand crafted instrument than to go to a music store and buy or order one. It is many times more involved than most ever expect.
A good luthier will give you any info you ask for concerning the guitar you plan to have built. Most of us that build customer spec ed commissions will spend many hours considering the issues and spec of what you asked for. Don't be surprised if we turn you down on some combinations or specifications. There may be some things you think you would like that just will not work together well. and a Craftsman worth his weight in salt will let you know.
More than anything involve yourself into the process. I promise you will walk away with a much greater understanding of what make and instrument great and how it happens.
Oh and don't let the price fool you. We make peanuts on our labor. Well maybe not if you name is Olsen or Cumpiano.

But I can testify that, The Payne shop has more peanut shells on its floor than green backs in its bank
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