The Sig Sundancer [link]http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXLCA0&P=0[/link]http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXLCA0&P=0 is really nice 40 size Bipe. A guy at our club has one with a Saito 70 on it and it really is a pleasure to fly, small, nimble, acrobatic, no bad stall characteristics. I have an older ACE 4-60 Bipe that is also a great flyer (60-2s or 60-904s) if you can find one, they are getting harder to locate, just reinforce the top wing mounting system (don't ask how I know). DG