Audio,
I carry a model 179 daily and it had a tight clip to start. It has loosened up a bit, but I didn't go bending on it. I didn't want to loosen it too much. Is easier to deal with now that I have used it for a while.
Had another brand of folder with a clip and that one wouldn't stay tight at all. It lives somewhere else now.
When you deploy those screws to play with the clip, go back with blue locktite. I have lost one out of the 179. No probs after the blue.
Let us know what your end results are.