This is a brand new knife and I was trying different torx bits on this screw and when I found one that fits, the screw could be turned back and forth with thumb and fore finger very easily. This screw shouldn't be that loose should it? I'm afraid if I leave it that loose it may wind up falling out and getting lost. Anyone know how tight the screw should be? I don't want to go to tight and cause the brass bushings to wear prematurely. All help will be greatly appreciated!