I say prototype, as if I will build another. I may, but it could be a while. Thought I would share this recent project, and also a specific question at the end of this post. All of the electronics are stolen from another bass, along with the tuners. Yes, the pots have been put in a project box and rubber banded to the tailpiece. This was not only an exercise in minimalism, but in limited tools. All I needed to make this was a hand saw and a drill. And I borrowed the drill (thanks Abel). Here is a 2-track direct recording, with all sorts of reverb, compression, and EQ-ing (the EQ to kill a nasty hum from the single-coil). I think it gets a usable and interesting voice. Right now I am using DADG tuning. Yes, when I built it I was listening to Morphine. But also think of John Parish when you listen. http://gurzil.com/slidebass/slide-bass-demo.mp3 The sustain is pretty poor. I am guessing that this is due to the nut and bridge. They are cabinet handles. I am fairly sure they are brass underneath the silver coating (it looked like brass in the grooves I filed for the strings) but they are still dinky on mass. Would a more massive nut and bridge be the answer to the sustain, or would I need a bigger chunk of wood? The body and peg-bars are poplar. It seems to be staying in tune very well. I guess giving it a set of non-recycled strings might also help.