Hi Randall. The Astro-hog is one of the most forgiving flyers, so minor incidence errors should only require minor trim adjustments. I believe it may have been the first successful low-wing R/C model.

In theory, down thrust is required for symmetrical airfoils, while flat-bottom types require little or none, since they produce lift at zero angle of attack. Your extra wing incidence may well be equalized by the positive stabilizer, which is strange, because most conventional aircraft (tail at the rear) require some negative incidence on the stabilizer, to counteract the pitch-down moment of the cambered airfoil. One full-scale light airplane required nine degrees negative stabilizer for straight and level flight. Some of our older aeronautical fellows probably know which aircraft that is.

Bruce; are you related to D B Matthews?