Board Thread:Fanon Canon 2/@comment-25152698-20140923000740/@comment-2089817-20140926135921

I feel like I should just point out that the "metal fingers" thing to make it easier to create the Rasengan is a bit iffy. Naruto used clones specifically because it allowed two individual people to focus on two individual tasks, like looking left and right at the same time, and then showed creation of Rasengan with his Nine Tails Chakra Mode, which involved the cloak's own chakra arms together with Naruto's own hand to create the Rasengan and his many variants. The latter example can be argued that it is similar in principle to the metal fingers. But I wouldn't. I consider it far too iffy.

The reason I consider it iffy is because you are then comparing the difference between tailed beast chakra arms and appendages forged from Kekkei Genkai techniques. And the main difference being that, in a state where these chakra arms exist (in a jinchuriki transformation state like the chakra mode), the task of molding chakra has already been accomplished. In the Naruto world, chakra molding is essentially the same idea as ki kneading; the preparing of the energy needed. In a chakra mode, where the beast's chakra is brought to the forefront, activated and molded, the task of chakra molding has already been completed. All that's really left is to shape the Rasengan, which Naruto can do on his own without a clone partner.

However, in the case of using a Kekkei Genkai to create additional appendages (like Sayuri's Metal Release), not only does Sayuri now have to mold the chakra for the Metal Release, but also molding the chakra for the Rasengan. So instead of designing a method of making the task easier, Sayuri is basically making the task even harder by now having to focus on the Metal Release molding to create the fingers and then the molding and shaping of the Rasengan. I mean, this is pretty much the same as using two normal hands to form Rasengan, and Naruto already showed he couldn't do that on his own without a clone partner. So if Sayuri's abilities are in the same regard, then it suffices to say that this method of using Metal Release fingers wouldn't work. It simply doesn't actually make the task easier, only more difficult.

Which is why, since Dal said originally with this method isn't necessary to be approved, I think you should just go with the clone partner thing as Naruto and Konohamaru do.