<!doctype html public "-//w3c//dtd html 4.0 transitional//en"> <html> I remember running into this some years back and it had to do with the angle of the jack to the  knuckle at rest if I remember correctly. Thats going to be to some degree influenced by Hammer Bore amoung other things. If you cant change that, then I think you are going to have to cheat on blow distance to have a chance of it playing satisfactorilly. A quick check would be to wegde the rest rail forward a little, take  up the lost mostion at the capstan, and compensate with less key dip. It might be worth a try anyways. If that doesnt work... then perhaps its because the hammer butt just plane cant get forward enough for the jack to easily clear the knuckle.,,, in which case you need a different hammer bore... or what ? RicB   <blockquote TYPE=CITE>  <blockquote TYPE=CITE>List, I need some help here, I am out of easy solutions. Problem:  Steinway uprights, 1 "K", 1 "X", and 1 "I", the first new, the latter two rebuilt by yours truly.  All have hammers the bobble.  I have rebuilt other Steinway uprights and serviced others of similar vintages which had no problems.  From the best I can tell the jacks start too far under the butt to clear the butt without extremes amount of dip.  In the "X", out of desperation, (I was at a customer's home, far from my home and didn't want to make another trip) I removed all of the butts from the center of the piano (double flanges), removed the jack rest felt and shimmed them out about 1/16". This was not a fun job!  Has anyone else seen this?  Any ideas as to a simpler solution? Thanks. Andrew Remillard</blockquote> </blockquote> -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway <A HREF="mailto:rbrekne@broadpark.no">mailto:rbrekne@broadpark.no</A> <A HREF="http://home.broadpark.no/~rbrekne/ricmain.html">http://home.broadpark.no/~rbrekne/ricmain.html</A>  </html>