Been flying one about the same size for about 15 yrs. Bought it from a fellow modeller who built it so I don't know who designed it. This is the earlier open cockpit version. Quadra 42 for power. This one needs the weight up front as it's on the edge of tail heavy. Does great aerobatics with no bad habits. Flies like a great big foamy. Friend of mine is looking for one so I'll put him onto that one. Thanks Dick. Great stuff.