Pretty sure it is an illusion. I don't get where you see 4-40 horns? I see nylon horns with 4-40 push rods, clevis. Rudder is a ball link on a nylon horn ( Big No No ). I agree that he does not have the experience needed to set up this type of airplane perfectly and there may very well be some geometry discrepancies but I still think most of the issue here is a twist in an elevator.