I have some height adjustable feed stands for use with table saws that I use to do mock ups when trying to figure out how high something should be.
I just did a spot check on where the top of my 'planing bench in the works' is at now. 5" below my elbow. It was 2 1/4" lower, and was ok at that height, especially for hand tool work where I need to lean into it more sometimes. After I put a bench dog surface across the top of it I soon discovered that the minor adjustment in height was better over all.!
5" below my elbow is what works best for me.
wbh1963 is flowing with the grain in Arlington, Washington, USA
A day without curls is like a day without sunshine!