I am having one of "those days"! When I first looked at this post I thought it said "stretch shriek and move". I pictured myself stretching, yelling in pain and getting up and moving around. My oh my, maybe I should start to worry about my mind for real!!
Thank you for showing us your sketches. This is a very interesting way to look at a nine patch. I always thought of them as equal parts, but that is not so. Thanks again.