<HTML> In a message dated 11/13/03 11:30:09 PM, Erwinspiano@aol.com writes: <BLOCKQUOTE CITE STYLE="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; = MARGIN-RIGHT: 0px; PADDING-LEFT: 5px" TYPE="CITE">From me, well there a= re simple ways to figure angle of deflection. It's the rear length of the st= ring from the front bridge pin to the aliquot times . 026 for 1 & 1/2 de= gree. .017 for 1 degree. This will give you distance bearing specs. I believ= e the average bearing force for a typical 160 lb. tension scale is a bout fo= ur pounds per string at 1& 1/2 degrees deflection. What I know is that p= re stressing the board usually yields a similar deflection after it's str= ung. It's simple to measure from the strut down to the bridge top after the = tension is on & I usually find about the same amount of squash that pre-= stressing yielded. </BLOCKQUOTE> Your trig sounds betterer than mine Dale. and I find the use of plate as a c= ustom stressing framework an especially elegant method of work as the Brits = have it. Have you ever slapped a few dial indicators on a plate while chippi= ng to see if it jinks around at all ? Just curious Glenn C.</HTML>