Board Thread:Theories and Speculation/@comment-28939725-20161201164545/@comment-25122992-20161205183055

Technically, Hashi DNA in Madara's body was also a "fake body bower", yet it was exactly the component that allowed him to awaken this Rinnegan in the first place. And Obito had a half of his body made from it. Fake or not, it plays the role in Rinnegan awakening and control. Also, nothing implies that Nagato "reached full potential" as an Uzumaki as well (I didn't see him performing Kushina's chakra chains or possessing a hax Uzumaki regeneration like Kabuto).