Having done this a lot lately, I notice one of the easiest things to do is leave artifacts from whatever you duplicated to use as the base for whatever new Edge, Weapon or whatever you're adding. I not only have done it myself, I've found it in material from other, fan-made data files (I was just checking to try and see if there's a common tag for pistols, and discovered that the Liberator from whoever did the Weird War II files is apparently a polearm.
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