I once bought a used Walter Woods Electracoustic Ultra from the original owner that was pretty well beat up. After owning several of Walter's amps something about this one didn't sound right. So I called Walter about it and come to find out it was a custom build he did for a customer that was voiced differently from every other amp he had built. He said he knew when he sent it out that it didn't sound good(to him) and was sorry he ever sent it out because he did want that amp to represent his work. The second Walter realized I had that amp he told me to send it to him immediately and in return he sent back a brand spanking new Ultra at no extra charge. That's an example of someone that takes pride in his work and takes care of his customers.
That is a class act...from a guy who was a pioneer, way, way ahead of his time with his circuits and concept.