Hey guys, just wondering how you have your thumb/wrist and arm when DT'ing? Since I started, my thumb has been 'loose' and it tends to do all the thumbing up and down. Recently, I had my first lesson in a long while (I don't watch video's of bassist's much either) and when my teacher DT, his thumb was rigid, and most of the movement came from the elbow/arm. So am I pretty much doing it 'wrong'? My thumb does go rigid, but when I'm going between strings alot (Say, something like Classical Thump) my thumb tends to start moving and loosening up. I was going to ask my teacher, but I havn't got him for a few weeks.. Is it bad technique?