Towing Advice

First, you need to stop using brochure dry weights. They are not accurate and can vary greatly. Your 7800lbs will easily be 9k+ even lightly loaded. An 1100lbs difference in dry weights is hardly minor, it’s 10% of your tow capacity. That will push or exceed the limits of most 1/2 ton trucks. That kind of weight should have a minimum 1200lbs of tongue weight to be stable. That probably exceeds the truck’s receiver rating and certainly won’t be helped using an Andersen hitch.

I think you’ve met another case of too much trailer, not enough truck. Add ons trying to improve it will only be bandaids.