I meant more checking that the listed ball weight for the camper is accurate. Weigh bridges can have different sections, so you detach the trailer, position the main axle on one section and the jockey wheel on the next, make sure it’s level, then you’ll get an accurate camper ball weight… I say this as a PSA on account of when I was looking to buy our first camper, the one we were looking at, the guy had replaced the stats plate (? The metal plate with the gross weight, ball weight etc) with a different one, unbeknownst to us. Ball weight was well above what he was claiming as he’d had stainless steel cabinets added. Luckily we caught it before buying.