Just got my new mp9c, 100 flawless rounds later I am VERY happy with the m&p. However, the only thing that bothers me is the looseness of my thumb safety. Are all m&p thumb safeties this loose, or does this vary between individual guns? Also, can S&W do something to tighten this up? I really love the gun, but I'm thinking of trading it in to just get one with no safety. Thanks.