I built one of those back in the early '90s, sorry but I didn't save the plans. It wasn't that great of a flyer from what I remember. I suppose this was because of the lack of any airfoil. It didn't want to fly inverted probably because of all the reflex required on the elevons to make it fly rightside up. It would do about 4 rolls per second though, if you alike a fast roll rate, this is the plane for you!

-Johnny-