I would take some of the dihedrahl out- about half as much as the plan recomends is good- as others have suggested.

Here is my other suggestions:
Reinforce the landing gear block A LOT!! it is terribly weak--add some larger Triangle stock and then glass it.

DOUBLE the size of ALL control surfaces- ailerons included

Put a 120 4-stroke or a hot 91 2-stroke on it for power.

Use Robart hinges or something besides those cheap CA hinges- if your gonna put this plane through a lot of hard flyin; you'll be happy with stronger hinges.

Pull-pull rudder

I like to cut the canopy down to almost half it's original size- makes the nose of the plane look longer- kinda like a warbird.

It's a great plane to fly-- have fun with it.