Building parametric guitar fretboards in Onshape - including Fanned Frets!!

Fretboards (indeed guitars) are beautiful things combining math and music and aesthetics... The pattern that drives the position of the frets is simple enough: position from nut = scaleLength - (scaleLength / (2 ^ (i / 12)))
But how do you implement this in CAD?
Onshape makes it easy, and by adding parametrics, configurations, decals, expressions to capture logic, and more... it's a really nice experience!
But there's more in this video... Fanned Fret guitars are fascinating things, and the fretboard looks super cool. Come with me on a journey to examine all this.

[@gregbrown-onshape7555]

If anyone is interested in the model I build, the doc (public version) is: cad.onshape.com/documents/bdfbbe1b67a9dbde2cacc66b/w/31dbaf9f62cc1ee7d955d808/e/a5219394c2a634aeffcb6199
I did fiddle with it a bit since I recorded the video (fixed a few deliberate errors, etc) but I also enhanced it more rigorously handle specifications such as string width at the nut/bridge.
If you do copy it and experiment with it (and like it!) then please feel free to tell people where you found it....