I just built my first fretless. I normally build fretted with a zero fret, so I was just kinda winging it with the nut and made it out of black walnut. I love the bass. It is made out of "left-overs" wood. It has a bolt on maple neck, blood wood fret board, alder body and Nordy big singles. The tone is nice, but no sustain... and I mean NO. One more piece of info, which is crucial... I stained it blue. Is there a better color for sustain????