Hi,
I built and flew a GP Texan with a Magnum .80 4 stroke. It was a beautiful plane and flew very well. The only problem I had with it was landing. I ripped the gear out 3 times, and I never did feel comfortable landing her. I always got the "big hop" on landing. The gear mount is very weak as well. I ended up selling it on the "bay".
The purists will say that this plane is not to scale, and they are probably right, but it is an awesome looking and flying plane!
Scott