Chance came out with the Wagon Wheel which was TM and all hydraulic, they made it kind of hard to work at first though. Had some bad seals in the first models and when replacing many would scar the cylinders piston which in turn would tear up the new seals. They also only gave the ride one T-bar to load the tubs on or off the trailer, made it real slow on setup/slough.
When I took over the one on United I had to fix all the lift cylinders, made T-bars for each tub, and determined there was a simple way to place the tubs that made sloug or setup even easier. Outside of that it had very few problems, was single trailer and easy slough.