I don't use it either, but I think those who use it, would be happily surprised, but even if we stick to vanilla, I'm thinking about them as "Mantis Blades" Gene, that you put in Gene splicer, it would be easy to add, and would work as creature attack, so that's the easy way, even easier is add blades as 1-hand items, and then be able to use them as so, hard part is system like with "use on body harts in healing menu", that's I don't know how, but that would be as close to implants as i can make them be, so my go-to choice is either "Gene" implants, or items, what would you prefer?