Rich,
Martin's are some of the best you can get .. but a whole different animal from the electrics.
I would imagine you can get some CNC work-holding ideas from them ..
My guess is they utilize CNC equipment very effectively.
Garylucas,
As a matter of fact my son Joel who is the builder of all these guitars is also a lefty ..
But things being as they are (mainly cost & availability) he plays & builds right handed guitars.