Changing the wing incidence helped out a bit and got me thinking about checking the decalage. I ran a long straitedge along the wing saddle and checked the horizontal stab in reference to that line. Seems that in the 7" length of the horz stab it's angled down 1/4". I guess herein lies the problem. I've decided to go ahead and make a new wing for it, using a NACA 2415 semi symetrical airfoil. When I cut the wing saddle for the airfoil profile, I'll change the wing incidence to 0 degrees and see how that works out.