Great info, but now I'm stuck in Analysis Paralysis. I came in to see if H20 over normal was worth the upgrade. I think "No" unless it is NP3. Now I'm thinking go black and try to get it coated. I'm afraid to start researching coatings. My goal is mostly something I can leave to my kids and great grand kids some day. And God forbid if SHTF, I can defend my family quickly and reliably.