I have the Great Planes J3 & I cut the cowl on a hanger 9 Cub. The Great Planes Cub is fabric covered is a very good flyer, has a 1 piece wing so transporting it is more difficult than the Hanger 9 Cub with its 2 piece wing. The landing gear on GP's Cub isn't scale at all. I'm putting Robart landing gear on mine. The Hanger Cub has more scale like landing gear & looks like a very nice Cub. The only thing that struck me on the Hanger 9 Cub is the N numbers are on the left upper wing instead of the right. I haven't seen Goldbergs Cub so i can't comment on it.