Thanks, Stringsinger -- Lots of good suggestions here -- and a good point re: control. I think my mental chat goes something like, "just because I can't control my finger doesn't mean I'm ready to give up decision-making about what will be played and how it will be played."
I've received, privately, a couple of suggestions about players to contact. I'd like more. I also need to have a chat with my engineer about what he could reasonably do to clean up how I play now. And I will do that when I see him next.
Meanwhile, I'm trying to pay attention to just where and when the problems occur in my playing.