Hmmm, I'm less convinced. I originally assumed the same but I don't like the implications of how that works.
Partly because it relies on Sakura somehow supplying the chakra regardless of what state she's in whether she's sleeping, injured or knocked unconscious which is hard to believe. Partly because she was working on it at the potential expense of her life, the lives of her comrades and her patients by deliberately withholding her chakra for jutsu.
And Shizune says she was doing it continuously which can also mean that it occurred at regular intervals every time. The act of storing that chakra can be where the delicate chakra control is required as well as ensuring the seal doesn't lose what it has stored to make it reset.
AoMythology said:
I've got a question too - what do you guys think that the graduation exam of Konoha included? Onscreen, we only see the Bunshin, IIRC, but that must have been only the ninjutsu part. What else do you think it contained?
Well, I'll say what I think it should be which isn't necessarily what it would be. Though it can be hard to tell considering just how ignorant Naruto is.
First would be written tests on subjects that aren't specifically related to ninja such as maths, language, geography, history. Things they need to learn to avoid being too ignorant of general knowledge.
Then written tests on subjects specifically for ninja like how chakra works, what the different types of jutsu are, how to identify different weapons, who are the past Hokaes and which division in Konoha does what.
Finally the practical exams. The spar with one another or the teacher with taijutsu, throw shurikens at target, dispel a basic genjutsu and then successfully perform each of the ninja taught at the academy.