Well my travels are over, but I've not yet had time to site down and sort out the FET checks and characterization, but I did want to share one little bit of info. Tonight there was a big thud outside... the type of thud that makes you wince a bit when you are expecting an amplifier delivery. The courier had scurried away before I could say hello. What is it that turned up on my doorstep? Could it be? Another AU-X11. And what do ya know? It was actually well packaged and didn't incur any new damage in transit!!! Check out this pic if you have any doubts as to the size of these beasts.... I'm not a body builder but really, this amp makes my arms look tiny. Although, I've got to say, that pic really hides the bulk of the machine as you can't see the depth of it which is significant. It is a dead machine also, but I was hoping it also 'just' had driver board issues and I could do the pair together. The seller reported smoke coming out of the unit during testing.... which other potential buyers attributed to him frying something, possibly the transformer, by not using a step-down transformer, but I had serious doubts about that theory. Anyway, I haven't done anything except cracked it open and checked the power supply and transformer. Aside from physically leaking main caps, the power supply and transformer are doing there job! (PHEW). I was partly expecting to find the remnants of some obvious catastrophe but all I find is a lot of dust, and a very suspicious smell from the rear driver board. I will check further when I have time and decide whether to start a separate thread to avoid confusion. Again, will try to get onto the original AU-X11 soon... have put in a mouser order for full rebuild of the driver boards, however, Burning Amp 2016 is this weekend in San Francisco so I'm not sure much will get done shortly, but it will happen.