<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=US-ASCII"> <META content="MSHTML 6.00.5730.11" name=GENERATOR></HEAD> <BODY id=role_body style="FONT-SIZE: 10pt; COLOR: #000000; FONT-FAMILY: Arial" bottomMargin=7 leftMargin=7 topMargin=7 rightMargin=7><FONT id=role_document face=Arial color=#000000 size=2> <DIV> <DIV><STRONG><EM>  Jon & All</EM></STRONG></DIV> <DIV><STRONG><EM>    I don't subsrcibe to this often stated hammer bore theory below but my mind is still open to convincing.   I believe there is one right optimum hammer bore spec & that's when it's hitting at right angles to the string. Lengthening the bore distance in grands simply scews the geometry up & to often misses the magic line & creating friction& heavy touch. AMHIK. </EM></STRONG></DIV> <DIV><STRONG><EM>   WHen the hammers are worn & subsequently over strike due to filing they simply need to be replaced.  No, they often do not but that's my story & I'm stickin to it. I observe that most american grand actions over strike the string from the git go. They are Designed that way IMO.  </EM></STRONG></DIV> <DIV><STRONG><EM>  Due to geometry the action achieves its full power when the shank is perpendicular to the keybed however in order to allow for this the hammers are bored a bit short to allow for let-off.  Make sense or not?</EM></STRONG></DIV> <DIV><STRONG><EM>  I  see where you are coming from on the  upright. It shouldn't be any different.  SO why is it?</EM></STRONG></DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT style="BACKGROUND-COLOR: transparent" face=Arial color=#000000 size=2><U>It seems to me that the better angle for the hammer would be<BR>an initial slight under strike so that as the hammer wears the strike<BR>angle approaches perpendicular (playing in) and gradually over<BR>striking as it wears further.  Instead of hitting perpendicularly<BR>initially and playing out from the beginning.</U><BR><BR>On this piano, 75% of the string cut is on the top shoulder. How<BR>can this be beneficial.  And why is there a difference in theory<BR>for strike angle between verticals and grands.  I see many<BR>verticals with this over strike.<BR>-- <BR><BR>Regards,<BR><BR>Jon Page</FONT></BLOCKQUOTE></DIV> <DIV></DIV> <DIV> </DIV></FONT></BODY></HTML>