I’m not sure I could structure my practice like that. Whenever I try, I get distracted. I admire your focus!
John, I’m flattered that you think I start clamping down above the stave – with anything quiet and sustained, honestly, it starts at the bottom of the stave. My tension trigger is more about the style of music. I can play short loud phrases happily up to at least top C with a good open sound. That said, I know what you mean about specific pieces/exercises too, though, there’s some powerful muscle memory there.
I’ll keep plugging away at singing C. It’s definitely having an impact, and it’s reassuring to know that my progress isn’t any slower than normal