Stuart wrote:

However, this is a woodwork group not an engineering group and such
accuracy has no use when dealing with a material that shrinks and expands
so much with temperature and humidity

Unless, of course, such accuracy is actually needed...

http://www.iedu.com/DeSoto/Projects/Stirling/Heat.html
http://www.iedu.com/DeSoto/Projects/JBot/
http://www.iedu.com/DeSoto/Projects/LLJ/
http://www.iedu.com/DeSoto/Projects/Bevel/

....sometimes engineering and woodworking /do/ overlap.

--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/