The Sig Four Star 40 is built by Sig Mfg.. They are available through Tower Hobbies, and should also be available at any hobby shop that sells models. They are about the most popular models for second planes, and for good reason. They are easy to build and fly great. They come in 40, 60, and 120 size, in kits and ARF form.

I built a 4*40 for my second plane and I love it. I hear the 60 is even better. Go ahead and build one, you won't regret it.