I have owned two of the older Super Cubs from H9. I will go on to say that they are not worth the effort to try to enhance them scale wise. The windows, cabin shape, wing struts, landing gear, and tail section of fuse are no were near as scale between the two different era's of H9 planes. The Super Cub is from about 8-10 years ago, while the New Cub just come a few years ago. I now own H9's New 1/4 scale Cub, and this one not only looks much more scale, but it also would fly circles around the older one, and it is just a J3.
The sad thing is , you cannot even get a windshield or anything from Horizon Hobby for it. The Wing tube is not even a standard size that you can get a replacement. I parted my last one out a year ago, since the parts were worth more than the whole plane together.