i`m with ya Dana , that was just a simple clip , some stuff I had lying around .
So what I see as a next and easy step is to simply change the various bridge patterns. So in stead of being on the outside dealing with the line of force - be with at least one arm on the inside dealing with the line of force. Which means you'll naturally want to project your force back and them - so they'll need something to do to make the drill circular that you must again redirect.
Ive got paterns for almost all positions now , the goal as you say being spontaneous chi-sau
however i`d disagree that creating them into a pattern is necessary .
the footwork and body movement is personal , I prefer more rotation , I do different versions I do the no rotation version and the rotation version , it`s a different tool for a different purpose , I prefer to use my body than my arm as much as possible . Footwork is actually simple in these drills once you have them down , and add surprising results .
Stryke - one idea I would have for you to think about is instead of stay in one place on the bridge as you receive - look at sliding your bridge as you receive - should turn their body a little more and your body a little less. In order to be able to respond to your return strike your partner will have to learn to do the same.
Absolutley but was Patricks first time , walk before we can run

, But i again dont think it any better just different , my initial goal on this is to develop receiving sensitivity from the outside , force on force would be counter productive at the beginning IMHO .
Look forward to more from others .