TP,
OK, now we're on the same page! Thanks! I were to machine the part I would start with a model in Rhino and then run it through Rhinocam to post the G code to run in Mach3.
OK, now, where shold I start to learn about how to use the wizard and wire a probe to the Gecko? Is there anything like Art's wonderful Mach3 set-up tutorial?
Jack