Yeah the entire plane vibrates, but only the aileron interconnects and the elevators show it. The fuse acts like an echo chamber even.

All the gaps are sealed with clear monokote already.

I am confident the 4 stroke Saito 72 is to blame for this. This is my fist, and likely last 4 stoke. It just vibrates too much. I have tried 3 different props as well. All the props are balanced.