JDark,
You haven't mentioned what you tow, that would be helpful. Hitches start big (and I'm being kind) discussions about what is right/wrong/best/safest etc. Good luck figuring it all out. BTW a significant amount of the discussion on Airforum was math based about all of the forces etc.
I'm gonna throw one other interesting hitch that caught my eye based on the use of Belleville springs as a centering system, the Husky Centerline. I have an Equal-I-Zer, came with the rig. Doesn't have an active recentering system, I see it as passive control. The Husky has a I WANT TO RETURN TO STRAIGHT built in within the head.
Gary