I want to put together a kit of HK45c parts that are most likely to break or wear out over time and shooting and need replacing. Can you also recommend some simple gunsmithing tools that will assist me in breaking down the frame and slide if need be (I do understand this voids the warranty)? Also, I understand that GGI does some kind of nickel plated coating on the internals... Does this make the internals less prone to wear and breakage compared to "uncoated" internals? And ONE more question... Are the internals of the USP and the HK45c identical? I'd like to get one of those USP mats if so. My Glock mat helped me to gut my G26 and understand it a bit better just wondering if the USP internals mirrored the HK45c.