You also need to look at it After you have the T.V. loaded for camping. You mention that tongue is about an inch higher setting on the ball versus level off of it. You really need to check it after you have the trailer and tow vehicle packed for camping. As an example. I have a Tundra Dbl Cab for my T.V. after loading firewood and all else we put in the back of the truck for camping my camper actually sits a little low (it's perfectly level sitting on the truck before loading).
I would say that if you cannot get it perfectly level when it is sitting on the ball, that low is better than high. 20% of your trailer weight should be on the ball. Having less will increase trailer sway.
Those are just my feeble minded thoughts!
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