This is a very interesting topic, thanks for bringing it up

Just a quick reply, i haven't really looked into all the links you gave yet

I always believed that the solar plexus was higher up, just under the ribs too, but interestingly i don't actually feel an energy center in that position for myself. I have the sacral chakra, then i have a large chakra / or energy center in my stomach, my belly-button being more or less the center place of this chakra. After this i have my heart chakra, but never feel, or have ever felt an energy center or energy in the traditional solar plexus place, just under the ribs.

I am not clairvoyant, so cannot see my charkras (only occasionally have i seen energy vortexing in a chakra like fashion into my body) so i am talking about my experience with energy sensation/s here.

Interesting though....