RE: goldberg
I have built two of these cubs and I have flown the rest of them - This one IMHO is the best.
But when you build it, you have the option of clipping the wing. Two words - DO IT!!!! (It's very simple to do during the build)
The original Piper Cub was designed back in the 1920's. They made the wing TOO BIG to make up for the lack of engine power. In the 30's pilots discovered that if you put a real engine in it and made the wing a normal size (Wing to fuse ratio) that it flew MUCH better.
Unfortunately, people think that clipping the wing is going to make it a more radical plane, when in fact, clipping the wing makes it easier to fly.