Ya I thought about that but since the box is almost empty(about 140 lbs)
I think it is reasonably close to the same load as 3-4 bikes that it is built for so i guess it is time to load some of the weight toward the front of the trailer and try again. We really need that box for what I refer to as dirty storage ,BBQ , oil , mix oil , fuel and such. I hated storing flamable stuff in the only compartment of our old trailer lol.
Edit: The new trailer flattened my truck the first time I hooked up and according to the paperwork stock tongue weight is 640 lbs , not sure if that includes two 30lb propane cylinders at 110lbs when full. And I know it does not include the dual batterys installed so without actually weighing it I am guessing 850lb tongue weight .
I also installed a set of firestone air bags to level the truck but it seems I will have to experiment a little to find the right combination to eliminate the sway issue.