Very nice.In case you have not done so somewhere else, I would be interested in your software setup, e.g. which Software you use (eagle?) and how you get the specific layers to process, etc. Great work!
I use kiCAD and pcb2gcode… you can see and get the project in the ShapeOko forum here: http://www.shapeoko.com/forum/viewtopic.php?f=28&t=1039