Is it possible (I'm sure anything's possible but, so how bout likey) to break the glass tubes in night sights while using a punch to install/uninstall them? I used a punch for several years before getting a sight pusher and never had any problems myself. I ask cause I know a guy that refuses to use a punch on his sights, not for fear of scratching the sights/slide but for fear he'll break the glass tubes. Is this really a problem, was I just lucky?