im shocked that there arent pages of theories on the dual chakra thing
now we know that there is a jutsu aside from what we have seen so far that jiraya told naruto not do. also im guessing its a summoning jutsu (kyubi) so naruto has his own list of summoning jutsus involving foxes but jus like oro he cant full control his summon since there sentinent.
This whole thing seems to me very good stuff since we know that the original seal allows the kyubi chakra to leak into naruto;s which makes me think that the 4th was tryin to completely erase the kyubi through this method. Even though i am presuming the second key has something to do with it cant come up with any solid thoughts
any1 got a good theory
apologize for spelling and grammar errors plz no flaming