Hal Debolt has used an incidence setup for pattern for a number of years that hat the tail about 3/4 to 1 degree more positive than the the wing. This is with symmetrical wing and tail airfoils. His comments were that it grooved much better than a standard 0 - 0 setup.

I wouldn't expect anything different with your - somehow "airplane" as a term just doesn't do it any justice. Nice work. You can send it to my home address anytime.