that does not make sense, the QD sling swivel itself can only grab so much and the sling swivel componet itself is pretty tight tolerences, once the steel retention balls wear the aluminium enough to become unrelieable it would not matter how thick you made it.... and your bound by the design of the swivel itself on how thick you can make it.
hmmm. don't get me wrong I love the design and the looks, very clean looking and the fact that you take care of both left and right handed shooters is super.... "when" I get a 590 I will probably grab one of those as I want the gun to be usable by everyone as a loaner, especially for women.