BigMan..... Please keep in mind that the tires on your TT are only rated for 65 MPH. Please be safe. I did read that you can run a bit faster if you increase the air pressure but I am not about to attempt it. A tire failure or 2 at 85 MPH would not be a scenario that I would want to try to control. It sounds like your setup is stable though. We also towed 200 miles this weekend. The weather was perfect and towing was, once again, without issue. Have a good time and be safe.