I use all of them. I use open a lot to get drone strings happening (playing on the D string above the G while using the open G etc). I don't think I would use four fingers below the tenth position but who knows, if I needed to I would. Of course I use four fingers all the time from the tenth position on, encompassing a perfect fourth or even more for a whole tone scale. What are you looking for by taking the poll? Are you struggling with two different schools of thought or just the curious type?
