Interesting because I recently assembled a Focus II, and the "instructions" (such as they were... good thing they really aren't needed, LOL) indicated that the wing incidence is +0.25 deg and the stab is -0.25 deg, relative (I think) to the bottom of the fuse or the canopy rails... whatever, and ignoring for the moment engine thrust line.

I explained to a friend of mine that this, in effect, created +0.5 deg incidence in the wing... or so it seems to me. The plane flies fine with the ailerons and elevators in neutral positions relative to wings/stabs, -1 deg engine down thrust, 2.5 deg right.

The H-stab will always "find" zero!