Thanks, Arthur for your description of your experiences with the various parts of Ex. 9. This seems to me very much in keeping with the kinds of insights the exercise aims to invite. And your decision to do the practice of Ex. 10 “how I am and can” is very much in the spirit of TSK (and meditation too, I would say.)
This is very much what it means to speak of “playful”, or full of play. The one who plays has nothing to do and no one to be. Of course, we all know that when we play, we can also become tense and competitive. But then we are no longer playing.
David, I like the effortless way that your practice of Ex. 9A. evolved into the practice of 9B. The fields of the senses are spatial, and the very fact that we can inhabit them simultaneously is an invitation to let the spacious enter our lives. As you suggest, thoughts are more challenging, because there is the content of the thought (including the emotionality) along with the process of its arising and passing away. This twofold structure, this complexity, does not exist for the other senses.
And Peter, your experience is effortless in a very different way. I am reminded of the statement in the Bible: “In my father’s house there are many mansions.” Usually, I think of that statement in connection with the sense fields. But today I have something broader in mind.
 Flying, the Kum Nye Exercise Gaynor mentions, is a wonderful exploration of the themes of DTS Exercises 9 and 10. As often with Kum Nye, the movement can dissolve boundaries.
 I am struck by how everyone writing in this unit has touched something nourishing, still, and open, that requires no effort. Space is our friend.
 Jack