The double stopping is quite simple. The "A" is an open string, so it can all be done in first position, and only requires one fretted finger. I'm not sure i like the tritone between the tritone between the Eb and A in bar 33 etc, but I wanted to keep the dominant pedal note going all the way through, although, at this point, it is in F major, so it's technically not a dominant pedal note. Anythoughts?