Don't hate me for not answering your question as to whether Sig or the Goldberg cub kit is better. I have built two of the great planes 40-size cub kits, one of which I built with the clipped wing. It's a great kit - easy to build and the finished product looks and flies great. If there's nothing else to distinguish it from the others, the barn-door ailerons look a lot better than the strip ailerons on the goldberg cub.