Re: "No Mind" - What is it?
Sounds like you have a pretty good concept of "no-mind". I think no-mind is a term used to describe several different states of awareness.
I don't realize I am in a "no-mind" state until I'm no longer in it. Often times in jiyuwaza or randori I will throw someone in an interesting or unique way, and suddenly the egocentric mind kicks in and says, "wow, I'm pretty good". That is usually the beginning of the end for me, as it becomes difficult to get back into the zone.