Hello! I posted this under New Members and they suggest I also post it here. I am getting ready to purchase my first Colt 1911. My question is the choice between the Lightweight Commander O4860XSE and the Combat Commander O4012XSE for conceal carry. I currently conceal carry a Taruas PT1911 (to be replace with one of the above) with a N82 holster, which does a great job of distributing the weight, and shoot 200-350 rounds per month with it. My question: Is the 6.5 oz. weight savings going to hold up to this kind of usage or should I go with the more durable Stainless Steel frame and live with the weight? I should also point out that I am seventy, so overall usage is limited (at most 30 years). Also what is the aluminum alloy used in the lightweight? I am assuming 7000 series. Thanks!