If you look in this image, you can see one of the screws at the wing root of the right hand wing.

This is the metalic cylindrical object within the fuselage.

The CMP planes use TWO per wing... one at the front and one at the rear.

The view of the one at the rear is obstructed by the fuselage former in the photo.

Even with only one in place, if it is properly secured, there should be NO rotation.

With two in place rotation is impossible.