Before making any adjustments get an empty weight of the TV and a reweigh with TT connected.
Attached is a weight to inflation chart for your size tires add about %10 to the recommend PSI based on the actual weight.
Using the method stated in post #9, make 2 PSI adjustment down until full tread face contact to the ground is achieved, that will be your inflation sweet spot for your rig. All of these adjustments are to be completed before the vehicle tires get heated up.
By running only the pressure need for the weight being moved, I think your driving experience will improve. Some have complained about wondering and death wobble on Ford trucks for years on my model by lowering the PSI to 55 on the steer axel loaded and empty, well, it tightened the front end up and improved the driving experience.
Retired Tanker Yanker
2017 F-250 6.7 2019 Grand Design Reflection 150 273MK Carlisle CSL16 225/75 15
May your pleasures be many and your troubles be few! Safe Journey.