Hi guys - I'm working on the prelude from Bach's d minor cello suite right now. my question here is about the last 5 bars, which are all 3-note chords. My teacher suggested doing up bow on the open A string, and down bow on the higher 2 notes. He said to finger the higher notes always with Thumb on the d string and 2 or 3 on the G string. My problem is, when I play up bow on the open A, my thumb on the d string is touching the A string which makes the note not speak sometimes, and if it does speak it is very muted. Does anyone have another suggestion of ways to bow/finger these 5 chords?