Also, make sure the incidence is in reference to the stab - I had a bipe once, that I checked, re-checked, and checked again, the wing incidence was perfect!!! Was ready to throw it in the trash, before I checked the stab incidence, and found that the wing was +3 and +4 off the stab, even though it was +1 and 0 to each other...corrected that, and it flew like a champ!!

Sometimes the simple things elude us!!