After putting more dihedral in the wings, she flew a lot better. But i have come to the conclusion that this is not ment to be a 3ch plane, and should be left as Tony designed it
One change that may make it more stable would be to reduce the aerofoil at the tips. Cut back the top and middle layer to the same as the distance from the trailing edge. Maybe this isn't necessary with ailerons, but i found that my wing had very bad tip stall.
I will rebuild this plane again once i arrive in Mexico, and keep it as it was ment to be built.