Maybe this is a n00bish question... But I've never understood... What the hell is the thumbrest doing on the bottom half of the bass? I don't put my thumb there while I play. Why isn't it up where my thumb would be, so I can rest it? What is the use of having a "thumbrest" below your strings? I've seen people who put their thumbrest on what I consider the "correct" side, but I more commonly see it on the bottom half of the bass.