I have had the same problem with mine snapping to the right also. I did not see any warps in the wing and figured it is that my right elevator is either faster or moving futher then the left so I turned the attachment on the 8-32 screw on the elevator 3 turns out and it seems to have tamed it down some what.

Since that has help with the snap I moved the screw again but weather is turning to Windy and cold so not sure if it will fly again till spring.

Did not notice any other change in flight since doing it. But I am not a pattern flyer so exact movement evade me.

Hope this help