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Modified parts of some of my Robart incidence meters to handle the big wing chord of the Cub.
The plans for the Cherokee are still hanging in my shop. I had a look and the incidence is shown at 1.7 degrees positive. The airfoil is a semi symmetrical foil. I looked over the BUSA plans and instruction manual and did not find any mention of the incidence because the incidence is set with the fuselage parts and measurements from the manual. I think with your wind set at zero-zero you end up with a plane that flies with up elevator trim and not the way a normal Cub flies with it's tail riding high.
See the rigging instruction for full scale