well here goes......add about 1.5inchs to the back of the rudder.run at least a .50.Ive got a 46fx and I would like a little more power.I do have enough to pull from a hover but I can only hover for a few min before the motor gets hot.I would make the rudder and elevator a 1/3stab 2/3 suface in stead of just making them bigger.Ive seen some with servos in the tail.I think I would do that to get the cg back.start at 4inchs on the cg.if your feeling a little rambuntios(is that right??) you could add 1 inch to the top of the fuse for knife edge.these are the things I was thinkin of doing to make this thing awsome at 3d.just some ideas I got from reading the post here.good luck!!!!!