Previously, I expressed concern over the inconsistency of thumb placement by my fret hand. Eerily, my pre-recorded guitar teacher addressed the issue tonight. What's scarier is his advice made instant sense and had an immediate impact (paraphrasing): don't worry about your thumb, worry about your wrist--keep your wrist down and your thumb will fall into place. The prescribed wrist-down technique has also improved my fingertip angles. As well, it helps keep my fret ...