B & W stow and go, 2" and 2-5/16". I just got a new Bulldog 2-5/16" that I will be installing this week. I don't think I will ever know whether I didn't have the ball fully captured, or whether this was the perfect storm, bad bridge joint and new Alcan 5-leaf springs.
That new hitch is interesting. What is the cost of the Shocker Hitch?