I've also heard of running slowly with the plane and it should feel like it wants to lift.The prop only going on one way is helpfull also. As for the c.o.g. question it should say somewhere in the planes manual and should be measured on the top wing. If it doesnt I think it something like 25% of the mean aerodynamic chord(if I remember right) which would be about 1/4 of the way back on the wing right next to the fuse. Someone correct me if I'm wrong because I'n not really sure. The only other thing(which you've probably checked) is that the elevator is moving the right way. I don't want to offend you but things like this happen. Ask me how I know. Hope this all helps. The monster