Just got my brownells 1911 aluminum bushing wrench today. It is quite loose on my gi bushing, which leads me to ask are all government style bushings the same outside dimensions? I know some are chamfered different, some are flared inside etc, but is there a bushing larger than mine that this wrench was oversized to accommodate? I have a plastic one already that was loose, that's why I got the professional one. Please advise, does someone have a wrench that really fits a gi bushing?