The spar is not strong enough in the wing of the Avistar. It's easy enough to burst the main spar with the Tower 46 on the plane.

The fuselage makes like a missle when the wing folds. If I were putting a Avistar together, I'd peel the covering back and fiberglass the center section?

You'll need to tie a brick onto the tail (about 3oz worth?)? Ought to go like all get out? But not for long with the 8oz tank.

Enjoy,

Jim