The Smallest Minority on earth is the individual. Those who deny individual rights cannot claim to be defenders of minorities. - Ayn Rand
delimiting? I can hope, but my fear is just the opposite.
Hayes is strictly about statutory construction. Very prosaic, technical and absolutely unconnected to Heller.
Also, Hayes has raised only a single challenge, at least on the indictment - that he was not convicted of a qualifying DV misdemeanor, but only of simple battery (a misdemeanor that does NOT attach Lautenberg consequences). So, if he is unsuccessful - there is no falling back to Heller, particularly before Heller is even decided!