I'm also wondering why he can throw Rasenshuriken now. Is it just because he's be able to train it more because Sage Jutsu lets him use it without ruining his arm, or does Sage Jutsu itself allow him to throw it?
If it's the latter, why exactly does it do that? Does having a bunch of Nature chakra just give it the energy it needs to be sustained over a distance?
Anyway, kinda surprised he pulled out his "new ultimate technique" so soon into this fight. Unless the thing takes out a bunch of Pains it's probably a bad idea.
Basically, what I'm asking is, when Pain says "Tendo's power won't return for quite some time.", is he talking about his ability to repair the puppet Pain again, or is he talking about his Almighty Push jutsu.