I am sure I am pointing out the obvious, but have you checked out all the
various resources and links at Linuxcnc.com? The reason I ask is when I was
just getting started it seemed to me there were more open source CNC
applications available that run under Linux than Windows. Since I finally
just went with a Windows controller (Mach 3) because I already had a machine
profile to run with it I never followed up on all those, but your posts on
writing your own code gernating scripts reminded me of that. Might be worth
a look see if you have not already exhausted that resource.