Oh my! I am sorry if I made you angry. You don't have to shout so hard, I am right here.

Between the 3 and the "and" after 3 something amazing happens but I guess I would have to keep that to myself now.

Can't describe it properly but I honestly suspect there are four physical oscillations which are not necessarily harmonic but which can be made to resonate with each other and produce a delightful movement if conditions are right.

I also feel that the Closed Changes are two of the more difficult figures in the Waltz syllabus.

Tomorrow morning I am going to start learning the Viennese Waltz for the first time (I am the teacher and there are two people in my class including myself) and I would be exploring things further. I am starting with a series of Change Steps with a quarter turn on each figure as per Alex Moore.
I expect that with the faster speed and the quarter turns on the Change Steps it would be easier than the Closed Changes which is slower, has no turn and only slight CBM.

I do not have higher education in engineering, computer graphics, human biology or related disciplines but I am willing to try and clarify the physical descriptions in my earlier post if there is anyone who is interested. Of course I would not be able to describe to you how I feel.

Sincere regards,
Andrew