I don't think the plankers are slow learners, its just that the 8411's have the specs they desire. They learn to put up with a bit more fuss, change gears more often, and their servos for the most part are redundant. You can loose one of the four 8411's on the rudder, or one of the two ailerons or elevator servos, and not lose the airplane. When a heli looses its only collective servo, its gonna hurt! With that said, the egg beaters were suffering more catastrophic failures than the guys flying boards. Did I get the terms right