Do you have the amp back yet? I'd be interested to know what the issue was... transformer or component(s) on the board.
I doubt I'll buy one, but I really like the idea of those amps. There have been two for sale for quite a while locally, but they aren't the ultra.
Sorry to hear of your trouble though.
Just sent the amp yesterday. It sounds like VHT won't fix it, but authorize the dealer to send me a new one, since the dealer is not a repair shop.