Has this been said, please forgive if it has, I’ve been having an unusually difficult time following this thread. The door hinge is forward of the CofG as the right hand door is opened it forces the wind to diverge to the right, pushing the nose left (Isaac III). So open right door a bit and plane turns left, open right door a lot and it acts not as a rudder forward of the CG, but as an asymmetrical speed brake, and the plane turns right. You know that sounds familiar, I think someone already said that.... oh, well hope I didn’t plagiarize.