Dave,

It was not so much as a license deal..... but more of a DH letting the WK and GP (I guess you would call it "Rights") to produce the kit. Bill did due all the glass work for the first Tipo from mold to production. Then, for what ever reason the rights we given to GP. As far as I know Bill did not due any other glass work for DH after the first Tipo.

The later Tipo instructions were building instructions with just the basics needed to put the plane together. No where near the detail the the WK or GP manual (GP basically took the WK instructions and change the name on the first page and copied the rest word for word) has.

The Tipo 680 was only offered via plans for the scratch builder to build. The 720 was the refined version of the 680 which had a slight change to the tail section and the wing was a little longer. The 720 was the one WK did then GP took over. I have the 680 plans that I will lay the 720 fuse on to show the difference.