I built one to be sure, not sure if it was a 30 or a 28? It had sheet wings, built up fuse, the sheet wings though had little riblets to hold the airfoil shape as I recall? man that was long ago, I flew it ,, well maybe flogged it is a better term, Ucontrol. dont remember it flying all the well, but then I didnt either, had the stunman 23, Little toot,(first complete flight on this badboy, and that was without the top wing, I carashed it and broke the wing off, flew it again anyway and actually got my first full tank flight that way, lol) also had the Lil jumping bean.then I got a "real" model, Goldberg shoestring stunter profile! Mcoy redhead 35 , now that was some flyin I am here to tell you, lol,,