Seems like it to me. Definitely Outer Path, I imagjbe that's where Kurama's comparison to the Sage comes from. I also assume BT was used. Otherwise, it's some no-named technique he used that magically brought the Bijuus to him
I believe so, unless he had complete control over the CTs, but I don't think that's ever really been implied about CT in general at all? Unless I am mistaken. Let's see what others have to say.