Think about how Deidara got his arm back. We missed a big clue that could of helped us figure out who Tobi was. Tobi used his space/time jutsu to retrieve Deidara's arm. We could of been known that he shared the same dimension as Kakashi. That shit makes sense!!! I don't respect any Obito theories cause they didn't mention this or that his right side of the face was not wrinkles, but wounds from the boulder.