The first thing any beginner guitarist learns, or at least should learn, is how to tune the instrument. Everyone starts with standard EADGBE tuning (from the thickest to the thinnest string) and the vast majority end there as well. However, many musicians, and by no means just those in the experimental genres, are not content with only one tuning. Let's take a look at a few famous guitarists who like to "twist the pegs" into unusual pos...