I sealed the hinge line on the elevators of my F-20. Nowhere else. I am happy to report that after the maiden, and two subsequent flights yesterday there was no flutter in the elevator or anywhere else.

As an aside, here is an interesting true story:

I went to A&P school in '78-'79. One of the instructors there was an ex Lockheed engineer. During class one day, discussing flutter on full size airplanes (don't ask, I don't remember past a couple weeks anymore ) he showed us a movie he had taken during wind tunnel testing of the Lockheed L-1011 during it's development. This was inside the famous, huge wind tunnel that Lockheed had in Burbank. It was a large, solid wood scale model of the L-1011 and it was mounted on some sort of stand. The wind was blowing but of course we could not see it. As we watched this model apparently just bolted down and totally stationary, it suddenly and completely exploded into nothingness. Vaporised! Well, as it turns out there were two cameras filming. One was a super high speed camera so the movie could be played back in ultra slow motion. What I saw then was mind numbing. The model in the wind tunnel started to move. The wings started flapping up and down. The engines were simultaneously moving left and right. The empenage was twisting right and left. All this was happening simultaneously. Then the model disintegrated. The instructor said this due to flutter. And this is what can happen to a real, full size airplane. After this, the engineers did some more work and solved the problem. Obviously, as the L-1011 was a successful airliner.