<html> At 06:04 PM 08/25/2001 -0700, you wrote: <blockquote type=cite cite>Roger:   The action is workable.  The key ratio is .53 for naturals and .55 for sharps.  The knuckles are 17mm and the dip is not excessive.  The caps are centered under the heels.  It's not grossly out, don't misunderstand me.  The action feels nice.  I just noticed that the acceleration rate was different and have noticed this variation periodically.  In this case once the static friction is broken the hammer begins to accelerate more quickly than many I have weighed off.  Anyway, on to the next one.  I'm tempted to try S&S parts on the next one I do, I'm glad to hear you were happy with the quality control.   David Love</blockquote> Could it be that the ones which accelerate faster also have a lower friction or Balance Weight? Check knuckle height, there may be a noticeable difference from note to note; another process prior to shank installation is measuring knuckle height and grouping similar ones together. Regards, Jon Page,   piano technician Harwich Port, Cape Cod, Mass. <a href="mailto:jon.page@verizon.net" eudora="autourl">mailto:jon.page@</a>verizon<a href="mailto:jon.page@verizon.net" eudora="autourl">.net</a> <a href="http://www.stanwoodpiano.com/" eudora="autourl">http://www.stanwoodpiano.com</a> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</html>