From practical experience -Two Phaeton 90's, 7 aeromasters, 2 phaeton 40's,3 Lazy Aces Plus more--all have required about 1.5 degrees less angle of attack on the upper wing than on the lower one to fly nicely. Just a change of 1 degree can turn a doggy flier into a pleasure to fly. If at all possible, set yours up so you can make minor adjustments on the upper wing and try different settings; I can almost guarantee that there will be sweet spot that makes the plane come alive. Mine have also all required a fair amount of right and down thrust to maintain heading at all throttle settings.