Buscht.... hell, I would've figured "BDC" to be used like that. Thanks for the info though.
I agree with with DAB, digitizing with a probe on a machine can be done. But to go as far as reverse engineering an entire part in full 3D will take some serious programming. If you need this to be flexible (the probe on the cnc), it will take even more serious programming.
You'd be better off mechanically reversing the part for geometry until you get to that point. Or, looking into actual digitizing equipment to render in 3D. Pricey though...