Thanks for the info opjose.

The problem with this plane is it does the tail wobble thing at high speed as well. After coming out of a banked turn when you bring the plane to level flight it will shake the tail. Slight gusts of wind will make it do it as well.

I think because most of the vertical surface area is up high the plane itself kind of pendulum's underneath the tail.

Think of a leaf falling to the earth swaying from side to side in a u shape as it falls. Thats the motion the rear of the plane is doing.

I am no expert on these things however. And could be way off