This recent thread might help you possibly decide on where to or where not to purchase a Backdraft.
Got delivery yesterday and need some help
While I can't speak 1st hand on a new purchases of a BDR, I can say Jay (aka Cashburn) from VMS and James Yale with Radical Roadsters here in TX is also supportive. Other than that I haven't seen Boo as far as tech support questions from the Boynton Beach Factory folks.
Funny that Jay's shop is not listed on the Backdraft site as a dealer...hmm.