Hi Alan, thank you for that. My experience is that from time to time I get to the vibrations stage, and then click out asleep. I've a couple of times made it OOB, but quickly dropped back into the 'eyelid vision' state.
There seems to be something else as well that determines my ability to access these states - I can go for months without even getting close. It's possibly the result of being a bit uptight due to stressful circumstances or the like, or perhaps some other variable I'm not conscious of.
When the mood is present there's this warm fuzzy sort of feeling, and a mental peacefulness.

Wish I knew what ingredient X is...