Achieving low effort balance

Hi, I just completed a new blog post, on connecting the hand to the keyboard with low effort. You'll doubtless see plenty of similarities to Alan's approach, but there are a few rather different perspectives on offer (as well as what I think is in important means of distinguishing the difference between the effort involved in truly supporting the arm entirely at the shoulder end, compared to illusion of "floating" while the hand is connected to the piano). One of the main goals is provide a rational understanding of how to synthesise the benefits of a weighted vs floating arm and to perceive which aspects of each are useful. Any opinions or observations are greatly welcomed. Andrew