Set the aileron and the elevator throws to 5/8 of an inch on low rate and 3/4 of an inch on hi rate.
Make sure it is not tail heavy.
Ask yourself this question is it balanced at the recommended location?
If the answer is yes. add one ounce of weight to the nose. either lead, move the receiver battery whatever you want. stick a dead frog in there just move the CG a little farther forward.
With those minor changes the plane will behave much nicer for you.