<HTML> <HEAD> <TITLE>Re: Hammer boring  & Teflon center pin height </TITLE> </HEAD> <BODY> <BLOCKQUOTE> 3 So in order to retain a more normal bore distance the solution seems to= be lowering  the entire stack/center pin height.<= /FONT> The wippen center i= s also higher than the nominal 3 & 1/4" from the keybed as quoted b= y Steinway for the height so that will go down as well it seems We change the height o= f the stack every so often in our shop; Dale, you can call Steve Bellieu---h= e’s got beaucoup experience with this.    I d= on't see any problem lowering the stack unless it changes the magic line of = wippen center to bottom of balance pin intersection of the capstan at half t= ravel radically. Exactly. </BLOCKQUOTE> David A. </BODY> </HTML>