The reason I am so set on accurate weight is because my current TH has a tag that says my UVW is 13,6xx. I weighed it just last week with basically nothing in it, 2 bicycles, 4 6vdc batteries, propane and a few odds and ends. It weighed 17,3xx. There is no way I had over 3500#'s of stuff in that trailer. WW fudged the numbers real hard on this unit.
If you think a "modern" truck can pull just about anything nowadays, you're fooling yourself. Remember, just because it can pull it up the hill, does not mean it can stop it going down the hill. If WW was still in business, they'd have a lawsuit on their hands right now.