This 3D model is one two identical models that I fly and it had aileron flutter when flying into the wind. The addition of balance weights to the large ailerons cured the problem. The other model has no flutter at all.
The model has flat wing tips that allowed me to easily glue balance weights to the ends of the ailerons. The lead weights are embedded and epoxy’d in cutouts in the light plywood that extends forward of the leading edge of the ailerons.
When the ailerons are neutralized for transportation there are no long protrusions sticking out to hook into anything else in the car.