My 2 cents:
Orders with one individual Luthier are much different from say a Martin Custom Shop instrument.
John Kinnard is selecting my next woods. I do not intend to wait this out. As always I intend to ROCK IT OUT.
That said, I too would hesitate to pay much upfront! Fortunately John's required deposit is very reasonable indeed.
Lots of great advice from experienced folks here!!!
Best on this
Paul