I'm want to practice on my Technique i play jazz,blues,rock-all the streams,reggae,and a little bit metal so i want a exercise to practice on speed...part of eight&part of sexteen...mmm and more things that efficiemt my speed and my technique at all. and good artist to play on they songs so i well be happy if toy help my thank you all! and one more thing: why pepole need more than 6 strings? why is good,it help in what? if you have a explanation to my question be my guest!!! thank!