Hi, I've been reading some interesting threads on LH position, and have found some advice regarding the avoidance of using the thumb as a clamp; rather, all the main force should be done by the "long muscles of the arm". In fact, they recommend an exercise consisting in pressing the strings without the support of the thumb. Well, I tried it and like the idea. The problem I'm having is this: I have, through hard work, accustomed myself to play standing (I became once a stool-addict, buy now that's all behind...); when standing I can't balance the bass in order that the pressing force comes from the arm and not the thumb. This I can do sitting on a stool, where I can block the movement of the bass. But --as I already said-- when standing there's no way for me to balance the bass AND avoid using the thumb. I got around that predicament with an "unlawful" proceedure (which I expect to be signaled as such by you, kind readers ): if I use my RIGHT hand thumb under the fingerboard (as I have seen on many fine players) while pizzing as a support, I can balance the bass thus: I pull both from this RH thumb and the LH fingers. Please advice me on this topic!!!