Tony, the instructions on every plane I have ever built require some degree of down and right thrust. Some beginner kits don't mention wing or stab incidence. For example, my first kit was an Eagle II (high wing trainer). It would kick hard left on take off without right thrust and without down thrust would not take off without a lot of up elevevator. Perhaps the kits you are building actually have right and down thrust and you just haven't realized it. All pattern flyers use a robart incidence meter or similar when setting up their planes. If you don't have one you should get one.