Thank you for the Queensryche! My SG won't do B either. C is the lowest it will go. You may want to consider using 5string strings if you really want B, but you may have to carve into your nut, which isn't fun or easy. I have done it (not on the SG), and don't recommend it. You can get a cheap five-string for less than it would cost you to repair your nut again on a nicer instrument.