Pane of glass in my head
half and half
I have a left tongue and a right tongue. If I imagine a pane of glass in between them I can imagine the right side sliding forward as I pull the left side back and vice versa. I can access this much easier than a couple of years ago.
Is there any value commensurate with the effort I put in? Probably not. I do think it has a tremendous influence on how I use my spine from pelvis to skull.
Late note- Just got back from a walk pushing my wife in a wheelchair. My left heel strike feels much better than ever before but I still invert as I slide to stance. There is a much better completeness to the feel of the left foot while walking. I will see if it lasts.