It has very little dihedrial ... I've owned both the Avistar and the Superstar, and the difference is quite noticable I just bought a .46 FX for it too. Right now I'm running a .46 LA which is fun when turning a 11X4 APC. It will go straight up for awhile ... I cannot wait until I try the same prop with the FX.

It's really nice plane. I have one of the old ones (Mark I). I don't know the difference between it and a new one ... other than the lousy covering that my old one uses.