Quote Originally Posted by irving2008 View Post
I haven't taken the saddle off yet. The gib strip is at the back so I assume that is where the wear will be, no? Is this a case of replacing the gib strip?
The Gibb strip can bend, it's the other side that may be the problem.

Suggest you loosen the Gibb, seize the saddle with both hands, shove it hard up against the Vee on the non-Gibb side of the bed and then twist it.

Does it rock or does it roll? You should be able to feel if the contact face has bowed.