I definitely agree with Keith McGavern's comments. I have had experience with the kind of 'seized' action centers you describe and Protek made the centers return to the same friction they were pinned at before and the problem has never returned (over 7 yrs now). This particular kind of seizure has only manifested itself to me only in Asian parts--don't understand it exactly but could it be related to how well the lanolin is removed and the Protek restores the lube it needs? Whatever, Protek sure works awfully well and why repin except those which do not respond or end up too loose? Have fun. David Lamoreaux
This PTG archive page provided courtesy of Moy Piano Service, LLC