<HTML><HTML>In a message dated 12/17/2004 5:25:= 45 PM Eastern Standard Time, Richard.Brekne@grieg.uib.no writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT= : 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">The jack spring and center pin = configuration need only provide for a reasonably quick return to firing position. Any increased spring tension <BR= > or over loosened center pins is really counter productive. </BLOCKQUOTE> Greetings,            The jacks' and = hammers' center pinning on this old Janssen upright are pretty good for its = age. Are you saying that if  the center pinning (on the hammers?) or <B= R> (jacks?) gets any looser by more wear that these springs arent a good idea. = I am thinking that if I replace these without repinnning everything, and the= piano gets more wear to the pins there could be a future problem? Perhaps I= should leave well enough alone? By the way, by the looks of this one, Janssen made a reeely fine upright! <B= R> Julia Gottchall, Reading, PA</HTML>