I'm builiding a SS7. It discusses using flush rivets for riveting the trailing edge of the flaperons. I have the quickbuild wing and the flaperons are already assembled, less trailing edge rivets. The skin is too thin to countersink, and the trailing edge is filled with hysol so I don't believe it can be dimpled.

How could you possibly use flush rivets? What am I missing? The optimum design would be to dimple the top and bottom skin prior to assembly, and then double flush set the rivets. Basically that is how it's done on the RV-10 rudder and elevator trailing edges.....

Thoughts?
Thanks