Marian, I think airfoil choices have always been the designer's "auteur" mark, so to speak. There's still a lot of mysticism attached to them. With model airplanes I've always felt like there are too many other variables like wind, the model's weight and size, etc., for slight mods in an airfoil to make much difference. But, they are probably more critical with competition sailplanes and pylon racers, I guess. At least those folks put a lot of significance on choosing the right one.

I've made some progress on the Dragon Fli plans. I basically redesigned the fuselage construction. It can now be built straight using a very simple jig; the top edge of the fuselage side is straight all the way back and follows the thrust line at 0° from nose to tail. All you'll have to do is build the fuselage upside-down on blocks which are all the same height. The top edges of the fuselage sides will rest on these blocks ensuring that things are straight. Then, you just use side clamps or blocks (like the RCM fuse jig) to bend the sides in at the nose and tail. This is a lot simpler than trying to use blocks of various heights or even building the fuse in two halves.

David