"Yes," the marine says nonchalantly. "It's an invasive procedure, but all a skitarii is is an enhanced soldier. Think of it as a combat system rigged into a humans nervous system. Reaction times inrcrease, precision gains are astronomical, and the endurance of the human body is multiplied 10 fold while retaining the personality and self awareness since I don't have the facilities to use the common indoctrination. Hence the need for the subject to be willing. "Servators however require much more crude techniques, while much easier reduces the mentality to a personal brain dead slave. Hence I ask for criminals."