HI DOn, I built one stock. Listening impressions have been already recorded on audioroundtable, at the thread starting at: http://www.audioroundtable.com/Tubes/messages/51.html It sounds pretty good. I plan on changing the caps. I'm going to leave the trannies stock, since imho it would destroy the cost effectiveness of the amp to do that. Actually, it sounds pretty good stock. Read more at: