Set the engine thrust to be zero in relationship to the stab. After that if the wing has a degree or less of positive I would go out and fly it before any other adjustments. Verify the washout, I personally would not want any but the builder of the airplane may have set the wing slightly positive as a trim adjustment. FYI I set up all my aerobatic airplanes with .5 degree positive in the wing so that just the wing flys at a positive AOA and not the whole airplane.