I've had a further thought about CO2 based on my own experiences with it. Just wanted to share in case it's useful to you in any way. If so feel free to share it any way you wish.
Long, long ago (about 1975/6) I was involved in the so-called Charismatic Renewal in the UK. When we met at home across the denominational divides it was normal to experience prophecy, visions, interpreted tongues, and to receive words direct from the Lord. In other words, the flow that Mark Virkler pointed out as available to all of us was well known at that time and expected eagerly - but only in meetings! (At least, that was my experience.)
We expected the free flow of the Spirit during our meetings, but it didn't occur to me that this was also available personally and at any time. I think I was under the impression it was only possible because we were meeting - as if the Spirit fell on the meeting, not on the individuals gathered there.
So the flow component of Virkler in CO2 comes very naturally to me and leaves me wondering, 'Why have I not been doing this for years and years?' How silly! But better late than never, and CO2 has played an important part in achieving it.
Very helpful comment, Chris! Thank you.
PS. The photo is of Ely Cathedral in Cambridgeshire where Chris lives. Seems that a new and very different expression of church is now developing there!