Also, on the third point, I was actually surprised after watching the film again at how few atemi he is using. In the book, I know that I missed several of the atemi after watching my video and looking at the book.It's funny in the video he doesn't do all that much atemi.
had seminars with Mary Heiny sensei and she mentioned that if your technique didn't include at least 3 atemi, then you aren't do it right. don't know how closely the practice at Shingu to M Ueshiba. also, nage initiates the technique with atemi where uke responds to the atemi which allows nage to perform the technique. i watched the old film and it looked like M Ueshiba did initiate with atemi, just slightly ahead of uke.