If you take a look, you can see I cited that thread myself in my initial post. I also provided a video as a further example.
My interest was to get an explanation of "dual opposing spirals". I'm not an expert, so this idea of dual spirals seems a bit confusing to me. What are they and how does one create them? If you guys are claiming they're important to elbow power - and that aikido elbow power is different to what's been cited so far - Id like to know more about it.
This was an image Tom Campbell linked to in a thread in the NTMA sections that didn't really show what the spirals were, but it at least showed where they are, maybe it helps somewhat: