<HTML> In a message dated 10/17/03 10:51:55 PM, Erwinspiano@aol.com writes: <BLOCKQUOTE CITE STYLE="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; = MARGIN-RIGHT: 0px; PADDING-LEFT: 5px" TYPE="CITE"> If you took out the old boards in 5 Steinways of any give model y= ou'd find some way thicker or thinner than the others but with a general ran= ge or parameter. I've measured a 70's CD S&S B with a soundboard max. th= ickness of .310 in the middle as S&S & other are generally thinned= around the edges for flexibility (diaphramized as S&S says) That= would be considered thin for a B. On the other hand I've seem them as thick= as .375 ish. The thin one sounded totally awesome & I was surprised it = wasn't a "thin" sounding piano. In my work I'd be using Sitka panels &= opt for something about .340 to.360. For smaller models thinner is fine,= .300 to .325ish. By the way You own an A I'm told & I've found it com= mon for them to be .350 ish. Ds & Mason BBs can be as thick as .400. N= ot sure this more than incidental trivia but you asked. Regards--Dale Erwin </BLOCKQUOTE> Dale, have you ever tried to measure board thickness on a board in place ? I expec= t it could be easily and very accurately done with a depth mike whose spindl= e is cut down a LOT, but this requires drilling a hole in the board. Regards, Glenn Coleman</HTML>