RE: Duraplane
I once built a S.P.A.D. (Simple Plastic Airplane Design) out of coroplast and plastic downspout. It flew pretty good too. Ugly thing, but it flew... crooked wing and all.
Someone once told me that if you took a door and put a large enough motor on it, he could get it to fly.. ha.. well, at times, I believe that.
I'm not trying to detract from your plane, just trying to be a tad bit funny here.. Enjoy your Duraplane. As you can see by my first line, there is something to say about getting some things to fly and enjoying it!!
DS.