I'm looking at the ascending F sharp scale. I see the fingering suggested is 123 on the first three notes (i.e. thumb on the F sharp). Do you use that, or the traditional fingering in scalebooks, which is 234 (i.e. second finger on the F sharp). Which one do you think is better for this particular passage?
I had this problem too. What I did was keep the left hand in strict time with the metronome. It's 7 against 2. Then there's 5 against 2. That's how I did it. The key to this passage is to be good at playing scales in A major and F# major.