It all seems to revolve around this getting the hips further and further forward and balancing on that point where your just about to spring back up. Trying to use that to give me support in hanging back and bringing all the other back bend elements into play, ( in no particular order) lengthening up through the spine, pelvic nutation, grounding heels, breathing through, relaxing, keeping feet straight, last little bend of the knees. I have that bringing the knees forward now I want to try to remember to engage all the other elements while I'm there.
So this afternoon I warmed up with the Tadasana back bend subroutine then went into five drop backs then Ushtrasana, Laghu V and a couple of Kapo's. The Kapo was nice if you turn the sound up you can hear the breath slow and settle a little (a little), feet were a little slippery. Please, somebody, bring out the velcro socks and gloves.