Hey, thanks SuperKaos. The prop that seemed to work best was an APC 10x3.8.

rightflyer - I do not have personal expereince with it, but did read that someone was flying the 400xt on this plane and was getting like 20oz of thrust on 3-cells. I just picked up one of these motors myself when Hobby Lobby had them for $20 [X(] I am going to use it on an upcoming bipe project.

-Jeff