Nilo, the Goldberg Annivesary is an absolute delight!
And I'll repeat what I said earlier about building the clipped version. A lot of people are afraid to clip the wing thinking that it is going to turn it into a rocket, but here are the facts:
The original Cub was introduced as an "Everyman's Plane". The designers wanted to keep it inexpensive, so they used a very small engine. Because it had very little power, it needed a big wing. A few years later, a few people discovered that if you used a bigger engine, you could cut down the wing size and have a really good plane that wasn't as clumsyand lumberous as the original.
What this equates to with models is this. You colud build and fly the GB Cub with the full wing, and it will fly with a .30 size engine (Providing all you want to do is take off, circle the field, and land). But slap the right size engine on it, and now the wing is too big for all that extra power, yet clipping the wing doesn't cause it to be too hot, it just allows it to be more agile.
Try it! You'll Like It!