Dont you guys think its funny how, Madara took every last bit of the 10 tails chakra exept the half chakra of kurama.... AND he didnt even unlock the tomoe rinnegan thing that sauske has?
I think one would need to be a perfect jin to get the eye... Madara is selfishly using the juubi's chakra for his own. which is kinda like kcm, where naruto took the kyuubi's chakra for him to use...