My experience with new Kawais is that they need to be tuned more often than some other new pianos because they use higher tension scales so the elongation factor is higher and stability is lower until the strings are well stretched out. This is not a real problem, except for the tuner. Some pins are tight, some coils are higher than others so there is a different response to tuning. If one wanted to lift coils, level coils, tighten beckets and then retune there would be no problem, but I would tune those pianos again and then check for unisons. I don;t believe there is a problem unless the piano is tuned with the idea of analyzing before and after tuning. Newton
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