Hi Tony, In my pratice I do not see tuning stability differences related to price or quality. I do see more stability in pianos with a full perimeter plate design where the soundboard has little downbearing on it. I also find pianos that have individually tied strings a bit more stable--but I think that is due to less plate flex. Young Chang for a brief time made a 200 cm grand that had individually tied strings that was incredibly stable. The pianos that sticks in my mind as being the most stable are the Kawai UST-5 and UST-6. The UST-8 is of different design and much less stable. I'm seeing 48" Yamaha's (say from 1970) now where the sustain is compromised due to age. If you want good stability control humidity to a range of + or - 2.5%. Good luck! Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. Non calor sed umor est qui nobis incommodat mailto:pianotuna at yahoo.com http://us.geocities.com/drpt1948/ 3004 Grant Rd. REGINA, SK, S4S 5G7 306-539-0716 or 1-888-29t-uner
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