Ooops, spoke too soon. I've tried the set of formulas I posted, and can't duplicate the known tables shown a page or two down at this site: <A HREF="http://www.dewalt.com/us/articles/article.asp?Site=woodworking&ID=2" target="_blank">http://www.dewalt.com/us/articles/article.asp?Site=woodworking&ID=2</A> The formulas get close on 90 degree wall angle and 45/45 crown, but are off the mark at other wall angles and with 52/38 crown. This could be operator error on my part... At least it's a starting point. If I ever figure it out I will post. (sorry about this conversation I've been having with myself!) regards