Talking about campers again, there is no way we can tip our 4200 lb camper even when rear holding tanks are empty.
However with fresh water tank up front, I noticed floor separation when on the jacks.
I reinforced some dry rot and cheap screws, but now I always have 4x6 sitting on block of wood supporting front floor.
Small item to carry and not only takes worry away, but also adds greatly to camper stability when used off truck.
For this reason I'm following through with the plan to install mounted PT 4x4 on the bottom of the camper and going to buy some type of automotive screw floor jacks that I can support the walking area in the camper and rest some of the weight on the 4 corner jacks when and if we off load at a CG. I'm thinking between the 8 jacks it should be pretty stable even in a good storm and have plenty of support.
Ed