<HTML><HTML> In a message dated 4/3/04 10:05:04 AM, edwithen@oregontrail.net writes: <BLOCKQUOTE CITE STYLE="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; = MARGIN-RIGHT: 0px; PADDING-LEFT: 5px" TYPE="CITE">The balance rail seem= s to be correct and bedded on the key bed. The balance rail felts are goo= d, and appear to be sufficient in thickness </BLOCKQUOTE> Ed Do you have The Piano Action Handbook by Randy Potter?  This book cont= ains the Manufacturer's Regulation Dimensions which should help you to diagn= ose situations like this.   Key Height, Sharp Height, Hammer Blow= , Hammer Let Off, Key Dip, Back Check Distance and Drop (on grands) are deta= iled for each manufacturer of pianos.  Looking under Kimball, for exam= ple, I find that the Key Height, depending on the model, varies from 2 3/8 i= nches to 2 3/4 inches.  That's a difference of 3/8"!  <FON= T COLOR="#000000" FACE="Geneva" FAMILY="SANSSERIF" SIZE="2">So when = you say that the balance rail "seems to be correct", I wonder if you have me= asured the key height and compared it to the Kimball's specifications. It sounds to me as if you have diagnosed the problem correctly, but to be su= re I would look it up in the PAH.  Either shimming up the balance rail= OR lowering the front rail would increase key dip. This book is available from  the PTG, I believe, and is worth every pe= nny. Tom Sivak Chicago</HTML>