Okay, major changes happening around both shoulder, the neck, and head, such that my upper back now seizes when I screw up and let muscle memory revert and tweak all sorts of muscles. I am both sore and in pain.
This said, a new noticeable change has occurred. I don't know if it is permanent, or will become so, but whatever...
When I achieve certain posture (one the current movements seem to lead towards), I perceive the air entering my nose now differently. I have always only ever known (one exception for another time) the feeling of the air passing by my nostrils, as if moving upward, parallel to my face. Now, I feel it enter inward, I the nose above the nostrils, perpendicular to my face. There is substantially more air flow, as well.
Perhaps some day I will no longer be a mouth breather . . .
I could add more, but I just hurt too much. The basic record has been made.