Can you raise the backcheck heads somewhat, by prying the backcheck wires a little from the keys? You may be able to do this at least in the bass, so that when the shanks are on their cushions, the tops of the checks barely touch the hammer felt. Raising the checks this way will dramatically improve checking. >>Dear list, >> >>I am stumped with the backchecks on this piano. The piano is an early 80s >>S&S L with new Premium blue hammers on Renner shanks & flanges and >>re-leathered original backchecks. I have CLOSELY regulated key height, dip, >>let-off and drop, spring tension, and all the other usual suspects. The >>problem is that the hammers absolutely refuse to check when the note is >>played at the level of forte or less. They just bounce between the >>backcheck and the string. The angle of the backchecks is good and they >>check high enough, but I just can't seem to get them to work in the piano. >>The problem is particularly bad in the bass and tenor, where the hammers >>are larger. <snip> >> >>Many thanks. >>Tom Seay >>Piano Tech Office >>School of Music >>The University of Texas at Austin >>t.seay@mail.utexas.edu Vince Mrykalo RPT vince@byu.edu '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''' Sense is an uncertain guide. Numbers cannot fail. - Pythagoras
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