hello everyone! i Just got a Second World War Japanese folding knife/ multi tool and the blade on the Knife itself is very loose, it has no locking mechanism and is held in place by a pin, i was Wondering if there is a way to make the blade significantly less loose than it already is, i tried lightly tapping the metal in place but am scared of damaging the knife itself... is there any ways that i would be able to resolve this issue? i am open to any suggestions- Dark P