I have been struggling with this harmonics for almost two weeks now. There hasn’t been much to write about, except finding the courage to keep working at the difficulty, and not yield to the temptation to replay easier pieces to help myself feel better.
I finally can hit a passible version of the harmonic A, but it only works (for me) when I bow at a certain place in the string. D is also somewhat do-able. I made a crucial bad mistake in preparing this piece, which I am seeking to alleviate now. I focused so much on the difficulty, I assumed that when I got past it, I would glide home. No, there are other issues, too. Sometimes, it is best to work around the difficulty, too so that I have more than 20% of a piece ready.
Anyway, I am writing this during a break. Back to practicing.