Thanks for reply. Yes, good old GIGO, but the tool I'm using is made by a professional. Though I may use it unaware I trust in it being better than me. It helps me getting aware of new aspects.

In this case, I was after only one point, the side force (tucking) the fuse might produce in knife-edge. I mentioned the cheeks because they enlarge the top-view area and thus this force, not downline drag. I think I understand that you meant the lateral flounder area producing the lift in KE.

I'm just wondering what's going on. Meseems with this thread and looking at the Z-50 I chanced upon a trick, namely positive incidence of wing and stab. When I tried, the model turned out to be still (nearly) neutral upright and inverted (as trimmed before), but now neutral in KE as well - to my big surprise. So it seems to be possible; now it would be interesting to prove it and find any requirements.

Edit: Forgot to mention that I'm talking about the simulator. It renders only the fuelages drag, side force, and vertical force in a simple manner, but no real airflow, and probably it linearizes all phenomena. So it's easy to get all-around neutral behavior - probably unlike in reality.