The BOB has a special extra long & strong quick release that mounts the trailer and allows up and down movement so it is not rigid up and down but is side to side. Been too long since I used it for a month or 2 and I don't remember the handling of the unit in turn radius. I am partial to a 30" wide 2 wheel design like my flatbed above. It uses a hyme joint in the hitch and it turns very tight.

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LennyHarp of Lenny's Bikes & Things
http://lennyh.com
The true value of a man is not judged by what he has, but rather by what he can do without.
"We are what we repeatedly do. Excellence, then, is not an action, but a habit." -- Aristotle