For the love of Jesus I find it so annoying to practice Variation 2 in the K331. Here is the passage:

The trills bug me so much, because they don't line up with the bass line, making it ridiculously hard for me to practice slowly. I like to practice my trills slowly and line them up with the baseline.
And it happens again, if you look at the descending notes on the last part of bar 1 it's like this:
F E D C B
A D EG <- bassline
If played with correct timing, then the baseline does not follow a natural progression, hence there is no way I can play it slowly.
So either I got my music notation wrong or I'll just have to suck it up and live with the fact that these notes don't line up.