Actually all the years I've been flying years back of ucontrol. I flown many stunt planes. But cox hyper is actually more touchy for some reason. And it gets me more dizzy
then my other stunt ucontrol airplanes. There .40 size. But it has longer wire and stuff. I don't know who has parts for cox hyper. But I bet atleast ebay does. Check it out.
Also if you want run ur plane with 30-35 percent of trexxas racing fuel. You'll see a huge difference.