Very nice Mike,
It would be nice if you could integrate all the conversions from one common ( free ? ) drawing program/ to Gcode / to machine code in one, we would all build or buy your miller, Oh what fame !.
I got completely lost with the Reprap and dxf and gcode, so I just made my 2 axis machine wander round like an old fashioned "turtle" with simple code, but at least I mastered the stepper motors.