The hydraulic legs could be a booger for sure. You could tug on them too hard and it would bend the tube part of the leg. One leg would go up and the other would stay down. Every building I went to had a giant pry bar about 6' long and weighed about 40+ lbs. Sometimes hitting a bump or a rise would be all it needed to go up. I had a favorite high spot in the yard I would driver over before I would head to the shop to pry it up. Mechanics absolutely hated those trailers. The hydraulic fluid would leak all over the shop when they worked on them. If you had say a high hook and the 5th wheel of your dolly or tractor went past the kingpin, it would take out the hydraulic fittings. The legs wouldn't work at all then, and it was an instant avoidable accident. Also every building you went to wanted the trailer jacked up all the way to make it easier to unload, and most smaller building had an air hose for that reason. Only thing is, they would jack it higher than it was designed, and the leg would pop out of the top of the tube and the trailer wouldn't go down. You had to bang it with a something heavy like a big hammer to help it pop back in and work properly. If I was asked to jack it up, I had a 6" rule, no higher than that.