Some thoughts about Backgrounds, especially Eufiber and Node. We're not necessarily following the technobabble explanation in the rulebook. If your character has Eufiber, it can have its origins based on anything you care to make up, eg it could function like FF's unstable molecules, or like the Venom symbiote, or like Dr Strange's cloak, etc, depending on how many points you put in it.
Same with Node. Your character can draw quantum from it, but it doesn't have to be a lump inside you. Sure it can be an inoperable tumour, but it can also be some mystic shard lodged inside, or even a pill you eat (that only works for you), etc