Thanks Chris, This gives some fuel for thought. I should have an editor. You are correct in the height of the bottom of the seat. 10 sun or 1 shaku. I'll continue to play around with the layout. The bottom and top of the mortices on the legs are not layed out square to the sides but rather sloped .2372 in 10. This is due to the fact that the legs are backed. Correct?
Hope you are enjoying B.C. and teaching. Do you cover this layout technique during your 3 month course?
Thanks again, David