That just shows that being able to do a neat trick isn't the pot of gold at the end of the rainbow.
Agreed, certainly. I am showing a neat trick (or trying to) that is along the way towards much greater things. My "trick" seems to work with high loads from uke (shown in the resistance sections). But beyond showing that here, I don't try to work with large loads to learn.
Regarding the muscle usage: I agree about working from weak to strong. And I agree that I have extraneous muscle usage in the video, and we can both see that. What I am thinking though is that I also have 'something else,' which I have dutifully worked on in a relaxed way, without partners. That something else is what I hoped might be evident in the video. I think the something else is not correlated with those muscle firings-- in other words different things are mixed in together, crap + good things. The presence of the crap doesn't necessarily negate the presence of good things that happen at different times and different places from the crap.. but I could be wrong.