My first build was the Contender (yellow and white), I love the way it flies, but yes, ailerons and rudder are a bit small. I should have gone with my gut and just built them a little bigger (changed the shape a little) and it would be much more aggresive. The speed is there for sure. My second build was a Great planes Ultra Sport .60 (red and white). Kit is available at Tower. Awesome plane right from the box, and not that difficult of a build at all. I'm waiting on my next challenge to show up. A plans build called Climax Delta. I have no idea how that's going to turn out!