Thank you very much Michael.

The arccontinue did work nicely on the trailing edge, interactively. Instead I'll measure the distance with MoI later, and
do 3pt arc instead.

The conic is a pretty neat curve for the leading edge. I'll try later to see if I can locate the tantan point.
Or just interactively find out the rho value, and then use that in the script... "simple"...

Edit, the le rho value is stated by MoI interactively, as 0.42609.

I was working on a new version for PropDesignGeo, January 5 2012, dropping a lot of "unnecessary" points, with conic le, and arc te, and
fixing up a join factory which I hope will work...