On my last build, not the current one in production, I went directly with Adrian. He is great...but I can totally understand that he is receiving a TON of email from all over the world. I can only imagine that he has VERY limited amount of time to answer each email and that can come off as being "short" or "rude". In addition, he is overseeing the luthiers, taking care of business orders and payments, shipping, recording demos and performing.
I chose to go through a dealer on my current build (Joker B 5 string hollowbody). The dealer I am using (Bass Spotlight, Randy Riley, has ordered so many of these and he is a bass player....so he can answer many of the questions and give good advice on what works and what is not possible. Also saved me a good amount of money!!