Yup. Wait till our genius lawmakers figure that out! Then we'll have all software that can be used to do that job require registration and inspection to certify that it "won't print gun parts." Or maybe "all software" for good measure, in case any sneaky so-and-sos try to make an IRC client with a secret "slicing easter-egg." Better yet, all software of any kind has to be sold through an App Store so we can have Google, Microsoft and Apple gatekeep. That'll work. Gun problem solved.