Originally Posted by The Specialist
I don't think chakra control has anything to do with it. Remeber it's more like a knack or special ability. Even with shadow clones, Kakashi said that it was impossible for himself to do it like that even if he was the 4th Hokage so I don't think it has much to do with chakra control.
I would not be shocked if Naruto was able to use the Fuuton Rasengan in one hand. He has been training with shadow clones for awhile, I'm sure Naruto could have picked it up along during his training. I do think Naruto is able to form and fuse the Rasengan with nature manipulation at the same time, he has a lot of chakra so something impossible for others may not be impossible for Naruto.
Exactly, Kakashi gave credit that even with the amount off control in chakra he has he cannot even do the incomplete Rasengan to its full effect because he doesn't have enough chakra to do so. Then he admitted that the 4th couldn't do it even though he had the chakra and control but not the "talent" or so to merge the two. Further more, Kakashi admitted that only Naruto had the chakra amount and resilence to do shadow clone jutsu and the rasengan and then start adding nature manipulation...... all of that at one time calls on a tremendous strain on the body and chakra. Like, shadow clones split your chakra, then rasengan takes 100% of your chakra and concentration to maintain, then nature manipulation calls of full focus since he isn't even using hand signs either......... and then merge all that together. After training for nearly a day with doing all that at once and with multiple shadow clones all doing the same thing too........ Naruto has to have exponentially increased his chakra control and amount of chakra. So, I would say that all that could result in being able to do the Fuuton Rasengan in one hand. But we will have to wait and see now won't we.