Just received my new Carnivore from Discount Knives. Handle feels great, seems really solid. Not a very sharp edge- I worked it over once with my 204 and improved it somewhat. Will probably try again. I also noticed that, when closed, there is a rattle when you shake the knife. It doesn't rattle when opened/locked. I presume this is some element of the lock mechanism. Is this normal? What exactly is it?