Yes it probably was one of the most frustrating experiences I've gone through.
But the amps sound even better as they burn in. Dean said he did not use some 'super parts' which were not as important to the sound as the upgrade and which could be easily changed later, meaning by someone else locally. He just wanted to get them back asap after I had gotten his attention. I did offer to pay - he had quoted a figure of over $100 (each?) - but he said he would cover the expense.
For the record I am not a tweaky guy, I just want to listen to good music. System, short version: LP12, Grado, Magnum Dyna, Meridian 508, ARC, A.Physic, XLO These amps are much better than the B&K 200w (model ?) my neighbour graciously lent me; and are as nearly/or as good but different than the Pass aleph 30 also from my neighbour (thanks again Bob!) They definately run cooler than the Pass which can double as a space heater in winter.
So, in the end, I think Dean is a good guy. He's not the best communicator or empathizer and most of his considerable grey matter is in the engineering dept. In my case, procrastination stems from perfectionism and maybe that's part of it. Or maybe not.
Thanks to the Audiogon community for your support and comments.
George