Hey Stumble. You don't have to have 2mm coro to build a good flying plane. Have a look at the Debonair that uses 4mm for the wing top and bottom. Here is a youtube vid of a Deb flying. I don't know what else you could ask from a sport plane. This guy also does some 3-D flying with this plane. Also watch another video from him called Dingbats Spad. Its a neat looking plane too.

http://www.youtube.com/watch?v=nma5sYEvP40

http://www.youtube.com/watch?v=VsKn7...feature=relmfuThe 3d stuff

http://www.youtube.com/watch?v=aVRV6ZXC9EM Dingbats Spad