I have been putting my M101A3 trailer to use lately hauling gravel for the driveway. The trip to the quarry is a 40 mile round trip. I have been hauling 2 tons of gravel with ease but this last trip the loader was a bit off. I told them 2 tons but when I pulled up on the scales and he had put 5,000 lbs on the trailer. the trailer was down on the bump stops. not sitting too hard but still overloaded. LOL... so on the way back I just took it a bit slower and watched out for bumps and rough roads.. I made it home with now issues. I am surprised on how well the surge brakes work even over loaded. stopping was still smooth and didn't push