Your comments are extremely informative.
Thank you, lj, but I’m just regurgitating what I’ve gleaned from the videos posted by the terrific researchers here. They find them, they post them, I consume as much as I can, and I summarize. The true credit belongs to those who found and posted the videos in the first place and I think you’re one of them. I still work and I have two big hobbies so I’m spread pretty thinly sometimes. Teamwork is one of the things that makes these threads so valuable and I’m happy to be able to contribute something beyond comments expressing music and image appreciation, though both of the latter are heartfelt.