Thank you. I'm beginning to get the drift. I have used CAD for designing PCBs for about twenty years and I certainly wouldn't want to go back to the early days of PCBs when I had to draw tracks by hand on to the board using a paintbrush. So I can understand the improvements which come from using CAD for machined parts.

I probably approached this subject from the wrong end. The right place to start thinking about it would seem to be the CAD, and THEN the CNC follows naturally from that.

(Which probably means I should find and migrate over to a CAD/CAM thread.)

Regards,
Ian