Jea48, I do feel badly about those folks that have had a bad experience with Kevin. I guess the hassles he has with some amps is not worth it for him. I have no affiliation with Kevin except as a purchaser of tubes. I have to say I don't understand his logic because most business people do not refuse a sale, especially when it can be quite substantial. I would say that this shows that Kevin does have integrity even if it comes across as somewhat distorted.