<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; = charset=iso-8859-1"> <META content="MSHTML 5.00.2314.1000" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT color=#0000ff face="Courier New" size=2><SPAN class=660141817-23012004>The bobbling I experienced in my own piano = was caused by insufficient key dip. The hammers were bouncing off the jack because = it hadn't gotten out of the way. I regulated the action and left plenty of = after touch.... end of bobbling.</SPAN></FONT></DIV> <DIV><FONT color=#0000ff face="Courier New" size=2><SPAN class=660141817-23012004></SPAN></FONT> </DIV> <DIV><FONT color=#0000ff face="Courier New" size=2><SPAN class=660141817-23012004>Richard</SPAN></FONT></DIV> <BLOCKQUOTE style="MARGIN-RIGHT: 0px"> <DIV align=left class=OutlookMessageHeader dir=ltr><FONT = face=Tahoma size=2>-----Original Message-----<BR><B>From:</B> = pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]<B>On Behalf Of </B>Clark Sprague<BR><B>Sent:</B> Friday, January 23, 2004 10:38 = AM<BR><B>To:</B> pianotech@ptg.org<BR><B>Subject:</B> Upright Hammer = Butts<BR><BR></DIV></FONT> <DIV><FONT face=Arial size=2>Hello, List!   I have been = wondering if anyone has experience with applying Teflon spray to upright hammer = butts. or McLube?  I have a customer that plays so lightly that the hammers = are bubbling, and I tried a few sample keys- giving more dip, changing the = backchecks, moving the letoff, etc.  None of the changes made her = happy, and she claims that she doesn't like the Click feel.  I usually = apply powdered teflon to Grands, but I was thinking that some spray would be = certainly faster and easier.  I also know that faster and easier = is not always applicable.  Just wondering if anyone does this, and their = experience.</FONT></DIV> <DIV><FONT face=Arial size=2>Clark Sprague, RPT</FONT></DIV></BLOCKQUOTE></BODY></HTML>