How does 'One Gesture' work on a scale?
Question: "Also, I'd like to clarify how this "One Coordinated Gesture" works when playing a melody/scale. Is there a jerky forth-and-back movement from one note to the other ? I'm not quite sure how the gesture would work with continuous notes."
Answer: Jerky movements are generally not going to produce a good sound. The notes have to sound "connected" and that means you have to find a way to connect the movements. This is why I advise doing a lot of melodies on one string before introducing the complications of string changes.
One gesture of expansion is at the core of all good musical technique.