I've been (trying) playing traditional grip for almost a year and i think it's been going well for the most part. The only thing is I can't control the stick during single strokes with just the thumb without a dull ache starting. I got this approach from Tommy Igoe in great hands for a lifetime and Jojo Mayer also has something similar in his DVD. I've just been playing singles with my thumb connected to my index finger So first: do you think I need to learn to play like this (with just the thumb? And second: could you give an explanation of what the thumb actually does?