I cannot thank you enough for posting this. I've not seen any better video on Youtube, and this really deserved its own thread, so I split it off.
The original link did not work for me.
https://www.youtube.com/watch?v=wigZsFypdyI was the one given in the comments on the first video and did work.
I
may have, many years ago, done one (and one only) of the things that Major Shul did. It
may have involved a different windsurfer.
Thanks again.