Thanks Winton
I am sure that Jeff Miller and I have different experience in life that contribute to a (similar but) different way of looking at the body ergonomics of hand planing. I think Jeff is or was a serious cyclist. I not sure how that works, since my years of cycling were reserved for getting to junior and high school My own experiences come from years of karate when I was a young adult, many years of serious tennis and squash, and decades of surfing and windsurfing. All of these sports emphasise the use of the hips in power and control, and bending the knees and remaining low for balance. I am sure that others could talk of the sports they played - skiing, golf .... - and how these are treated in a similar way. I find this an interesting subject since since the mechanics of hand planing and the ergonomics of handplanes, themselves, seen so similar.
Regards from Perth
Derek