Hi Chris, I really think your blogs are setting the stage for some long needed re-examination of established viewpoints. I'd like to go over a couple of points.
In your last paragraph you state:
I'm not sure whether people unfamiliar with "In Yo" get from reading the blog that this is an established aspect of Internal (Martial Arts) Training. Even in case some do, that is not to say all folks view In Yo the same, even within an Internal Martial Arts paradigm. Also since the quotation itself does little to explain how this 2+8/3+7 etc. model actually transfers on the physical (Internal Paradigm) plane.
So, the conclusion that Morihei Ueshiba was an internal martial artist based on his reference to this quotation, I fear, will for the uninitiated remain a gigantic puzzle. Or at least a big leap of faith.
I suspect the same goes for the next part of your concluding question.
Since your blog is addressed also/mostly(?) to those outside the Aiki/IP/IT/IS etc. paradigm, I'm not sure whether your first three excellent questions....
....automatically lead to the suggestion Ueshiba was an Internal Martial Artist. Even though you know I believe he was
Sure - that's mostly foreshadowing for things to come. Or I hope so...
I didn't want to get too deep into anything technical here, I'm not sure that I'll get too far into technical matters at all. I wanted to set the stage a little bit and point out the Chinese connection in a simple manner, I don't know if that came through or not.
It's been a while since I've really written anything of that length, so a lot of things are a little rusty.