hello all, my buddy has a wierd problem with his nexus, its an upgraded nexus to a .46, flies very nice except something wierd, when its hovering or in foward flight it wants to face in the direction of the wind, we hover nice and steady and it automatically starts trying to face in direction of the wind, then it becomes steady and does not move anymore, we've tried giving it less gain and then more, either or it still does the same thing, does anyone have an idea on what may cause this, we are pretty much lost in this one, any help is greatly appreciated. Oh it has a piezo gyro if that makes any difference.