I've done it..to a SD..because it needed a quick fix. Funny thing is..it's still sounds good to this day, and I did it 4, maybe 5 years ago now. The piano is rarely used, but never is there a concern with its sound. It is used for touring European acts requiring 442 or something other than 440. Some of those players scoff at the name, but that's as far as it goes. I have never had anyone refuse to perform on it. Lucky I guess, -Phil Bondi(Fl)
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