Josephine
How did it go? Did you manage to fix the ornaments?
Your message became a warning example for me. I was practising my Bach, and suddenly three measures of section 1, the section that I had started with because I (rightfully) thought that it would be the most difficult one, was gone. I had played it correctly many times already, but now I made first this mistake, then that mistake, then yet another mistake.
I almost panicked a bit, because I have memories of another section in another piece, with which I struggled until the end. It never really became solid.
This time, I did not want that to happen. I practised just a few notes, until the first mistake could happen, and played that correctly ten times in a row. Then I did something else, and added one note, and again played it correctly ten times in a row. In this way, I kept adding notes until I reached the whole passage. That was two days ago.
Today, I can still make an occasional mistake in this passage, but both occasional mistakes were random and occurred only once each. So I hope that I have prevented this passage from becoming a problem passage!