I've lately become addicted to using CentralConfig's ability to inject scrap/enemies into specific interior generations, rather than merely according to a given moon or LLL tag. I'd very much like to be able to tell the SkinRegistry to replace Coilheads in ToyStore and CircusFacility with COREsEND's SillyCoilHead, and likewise replace some Brackens in techbase interiors and all Brackens in Castellum Carnis with the Flesh Stalker model.