I recently purchased my first ZT; a 566CF. I immediately bought some blue blue titanium screws for it. I replaced the screws and noticed that when the knife is closed and I shake it, it make no sounds. When I open it and shake it, I'm almost positive that the screw that goes into the small washer at the end of clip, that appears to be part of the locking mechanism, rattles. If it's not that screw, something rattles. When your 566CF is open and you shake it, do you hear any rattling? Thanks