Update: My right leg is almost entirely alright, pretty certainly as a result of high quality massage-- there would be a noticeable improvement in the days after a session, and the average kept getting better.

I'd completely forgotten the kinesthesia switch, though I find I can still use it-- my current technique is focusing on a body part and telling it that it can rearrange the rest of me the way it wants. This also works, but I obviously need to keep records.

I still have no idea why my right leg tightened up like that.