I have a perspective on the Trailair most people don’t want to hear. I drive a 2004. 5 3500 long bed dually 2X4 pulling approx. 13000lb Discover America 31. 5 Quad. I have a 20. 5 Pullrite super5th hitch. I installed the Trailair pin box hitch and it created sever bucking or porpoising. Tim...