I would also add that you should check your expo settings.
Make sure that if your using a Futaba radio that your expo% is a negative number EX: -65% . I did this on my Kangke by mistake and set the expo to +75% on 3d rates and almost lost the plane.
Negative numbers on Futaba radios makes the controls softer around center. For JR radios it's the opposite
Also you should start with expo setting of around 65-75 % on the flip. You will be surprised at how much expo you need.