YOu will never believe me but I Microsoft paint is something I can draw anything with ease. For the original DV I drew it airfoils and all in paint, and then had the Japanese just blow it up however many thousand percent to get to 2 meter with fuse length. I the only thing that we altered from that hwas to move the stab up a half inch. From there it is
transferedinto Master CaD by the Japanese. I have always just been able to look at a plane and and tell the charecteristics instantly for some reason but never had any formal education about aerodynamics. I also really believe in the if it looks right it probably is and vice versa.

Chip