I disagree with your descriptions of Ueshiba's list
Chris wrote: Ueshiba described the "Hachiriki" as an active force, a quiet force, a pulling force, a loosening force, a splitting force, a combining force, a melting force and a congealing force (you can see that each "in" force has a matching "yo" force).
Your redefining without enough information. They clearly do not line up with say; the eight jins of taiji, though we can make similarities.
you are probably right - I would love to spend more time with Chris to look at some of the other interesting passages to make more of a case.
But I thought it was an interesting intellectual exercise if nothing else as to why he chose the specific Kanji that he did.