Justin & Cito, thanks for the comments.
- Cito, that is quite a bit of atemi indeed.
- Justin, yeah I can kind of picture what your talking about.
This is my first official time really trying it today. It seemed they wanted me to push forward, but what do I know - once I went under the arm and swung Ukes arm down, I didnt feel the flow was right anymore...however how you describe it seems to make sense and I would need to try the technique more to get the feel.
Good to know there are others doing the 'uchi'kaiten Nage.