<HTML>Hi Paul, Thanks for the advice.  There is plenty of aftertouch.  That w= as one of the first things I checked and corrected, because initially, there= was none.  Everything works fine--until the damper pedal is engaged. I will put some thicker punchings on a few balance rail samples and see = if it can be regulated properly before I raise the whole rail.  Could i= t be a leverage issue??   Dave Stahl In a message dated 12/6/03 8:29:10 AM Pacific Standard Time, pmc033@eart= hlink.net writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px so= lid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">   &n= bsp;        You need to determine if= there’s enough aftertouch.  As you go through let-off and the = key bottoms out, check to see if there is a little forward motion of the ham= mer, and that the jack it out from under the hammer butt.  If not, your= key dip is still too shallow.  Putting a thinner punching may get you = closer to the correct dip, but you need to be more precise with this adjustm= ent.  Setting the letoff point will help some, but you must be sure tha= t you have enough dip to make it work.  I recently worked on a Mason Ha= mlin large upright which had a similar problem with bobbling hammers.  = Actually it wasn’t so much bobbling, but the piano had a kind of = “loose” feel.  By raising the balance rail, the dip inc= reased and the checking worked much better.  Hope this helps.<FO= NT COLOR="#000000" SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0= ">          &nbsp= ; Paul McCloud          &nbsp= ; San Diego </BLOCKQUOTE> </HTML>