I purchased my Carbon Blades in June.. it came with the carbon look hard case. Recently something int he case broke (on the hinge/spring) so the case does not close like it should. along with it there is a rattle from the loose parts inside. I want to replace the case but want something that will last.. Do you suggest, another Carbon case, a normal ballistic soft vault or the metal vault? the Carbon Blades have been my daily pair since I got them..