Regardless of whether you are over or under GXXR etc, common sense should prevail. I drive a vintage '60s car and I have "nanny car" operators tell me they wouldn't ride in anything that didn't have airbags, backup alarms, anti-lock brakes, crumple zones, etc. Having successfully driven "vintage" cars for 55 years now, I have learned to respect the limits of older technology and by the same token, I have towed RV trailers safely over 25,000 miles, knowing full well what the limitations and dangers are and drive accordingly. I would rather ride in a TV with a skilled driver who is maybe a little over the GXXR numbers but understands the limitations, respects them than someone whose only understanding of safe towing is how the numbers calculate. Just my $0.02USD FWIW.....