That is not the usual reaction...
Put a bigger engine on it. My rx battery is tie-wrapped as far under the servo tray as I could get it and i added a 2 oz. fishing weight to the fwd atttach screw on the rudder servo. I just eye-balled the cg, but mine snaps and rolls really quick. As I was told, it is not a 3d airplane but is a very capable sport flier.