Now that I know more I'm going to rebuild the second CBG I built. It was an unfretted 3-string with a piezo that didn't work. So I've decided to replace a new piezo, round over the back sides of the neck, insert a more efficient and better looking nut, and install frets at the 3, 5, 7, 10, octave, etc. New strings and tuned to GDG. I was going to use it as a wall hanger but it sounds real good so I decided to try to save it. It can always hang on a wall later.