Turns out those pairs from day 78 were bony connectivity patterns. Now we know. I stuck with pairs for my pattern. I started with wrists/knees and then went onto toes/trochanters (the greater trochanters in particular - basically the outer part of the top of the femur. They used to come up a lot in release technique).
I'm just including video of the toes/trochanters improvisation, because it's more fun. And it's mostly more fun because of the music, which seems like cheating, but it all connected quite nicely into something that feels less amorphously floaty than many of my improvisations.