I see that many people find double stops easies if they use second position or third position to get the same tonal quality with a faster action. Is this a hunt and peck type operation when working with a new piece of music. For instance San Antonio Rose starts with a real easy double stop in third and slides quickly to first. Is there any automaticity to this or do you just work through a tune. especially is it requires a level of improvisation or ear training when the notes are not apparent and you need to develop the sound.