This is a project I've been working on the past couple days. My goal is to CNC an entire guitar, and a big part of that is making a fretboard that doesn't suck. So I decided to make use of the CSG.js library ( https://github.com/evanw/csg.js/ ) and some hacky polygon generation code to produce an entire fretboard from start to finish.
I'm waiting on wood to be delivered at the moment, but pictures of the first few runs will be going up as soon as that gets here.