Hello, Woodarc. I know how to do this joint (= I have worked out how to do it) the way that Japanese design house does it. Since I am brand-new to this forum, and don't know how to post photos, best you go to this link where I tell the whole story (for one sample joint):

http://forums.delphiforums.com/n/main.asp?webtag=woodbutcher&nav=messages&msg=5596.18&prettyurl=%2Fwoodbutcher%2Fmessages%3Fmsg%3D5596%2E18

It is a lot easier to make than the replies on this thread suggest - and easiest of all if you have a radial arm saw.

Love this crazy forum. I will be back.

Cheers
Mark