I am NOT a fan of the plastic clevises, however, there really wasn't much else I could do with these as the tubes were factory glued in. I keep an eye on them though...
I agree with RudeBoy, there is no slop with the plastic ones.
I did modify the linkage at the servo by adding a piece of metal in front of the plastic piece. (it looks like a plastic hold down strap) I also changed it to 4-40.
Knock on wood....no problems yet!
Gary