RE: Great Planes PT-40 Kit
Farr301,
I built this kit five years a go and still have it. GP manual recommends wing "A" for three channel setup (locked ailerons) and wing "B" (sport wing) for four channel setup. But, it is just a recommendation.
I built the sport wing "B" setup. Either way, the plane is very stable. One thing you need to pay attention to is the washout. If the twist of the wings are different, the plane will have the tendency to roll in one direction all the time.