<!doctype html public "-//w3c//dtd html 4.0 transitional//en"> <html>   Don wrote: <blockquote TYPE=CITE>Hi Ric, Increasing the height of the ribs on a true C.C. board would seem to me to increase the stress on the board--not reduce it.   <a href="https://www.moypiano.com/resources/#archives"></a> </blockquote> Dont remember suggesting it would reduce stress on the board... but I did understand Dels point. But here's a thought down the bunny path to think about... Say you have a pure CC panel already assembled and crowned... and THEN you decide to increase rib height..... and you use machine crowned ribs that match the already existing crown to glue on the the undeside of the existing ribs. Whats the point ??... just musing... :)... for now that is. Cheers RicB -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway <A HREF="mailto:rbrekne@broadpark.no">mailto:rbrekne@broadpark.no</A> <A HREF="http://home.broadpark.no/~rbrekne/ricmain.html">http://home.broadpark.no/~rbrekne/ricmain.html</A> <A HREF="http://www.hf.uib.no/grieg/personer/cv_RB.html">http://www.hf.uib.no/grieg/personer/cv_RB.html</A>  </html>