Hanger 9 78" 540 Edge
I have one that I am putting a FPE 2.4 on I have read various things on this plane and compared the cg to other EDGE 540's comparing and calculating the CG puts the CG at 4.25" Hangar nine suggests 4.5 to 5.25 primarily so that you can get it to 3D I also read that 4.25" gives better stabilityhere on Ultimate RC under Giant scale I think.
Also Make sure that the wing does not have any wash in or wash out This can be a cause of the snapping. if using dual elevator servo's make sure that you have even throw on both sides of the elevator and that they are linear (equal) through the elevator travel
Funfly 8