Don't forget that much of the factory calc of combined weight has to do with braking, not just load carrying. You're adding a whole other axle, with brakes, to the equation.
As to turning radius, it =will= be smaller than with a conventional FW hitch, because the king pin is so much further behind the axle. The back-end kicks out =away= from the center of the turn, which pulls the king pin further outside. I'd suspect that it's even smaller than a same-length TT on a standard receiver ball.
I did speak for a few minutes with the gentleman who owned the rig I saw in my pics, and he absolutely loved his setup. I don't believe it was the Automated hitch, but another one, which is no longer in business.
Lyle
