: I missed that jig. Can you post a pic of it or a link?
I wrote an article on it for The Masik, Summer 2004 issue: http://www.qajaqusa.org/newsletter/Masik_Summer2004_06041.pdf
The article starts on page 8. People who've built it have made some interesting modifications, most notably adding a clamping arm to the top. You may also want to use a somewhat larger radius on the radius blocks, if you don't want a boxy hull.

Wow, I can't believe it was that long ago! I really am getting old! ;-)