Tony, I'd say that right and down thrust are pretty much necessities for any propeller-driven model, but 99.9% of the time the designer has done his homework on those settings and they should be OK as recommended from the designer. The issue I would take is that 0 incidence on the wing. Fully symmetrical airfoils like those used on almost all aerobatic models cannot produce lift without a positive angle of attack. If you have an airplane with 0 incidence on the wing, the only ways to have the airplane fly level is to trim in up elevator (which will lower the tail and increase the wing's angle of attack), or put weight in the tail. Putting weight in the tail is the most common method because people want to have their trims at neutral. Flying tail heavy leads to all sorts of other nasty trimming and mixing issues that are beyond the scope of this discussion. So to sum up: I'm a fan of what the pattern guy said.