For a while now, the actual writing has been happening via Gitbook.

For folks who haven’t been following along there, please see:

https://willadams.gitbook.io/design-into-3d/

Corrections, comments, and feedback are welcome. Working on what should be the last project prototype, and the last chapter. The one thing which may affect this is the imminent release of Full Control Gcode’s Python edition — we’ll see.