[Action]
((OOC: Nnngh Aracowa, couldn't you have at least slipped some hint in there about powering it. It's possible there's some sort of power source in it, derived from alchemy, or it's possible it runs all from nerve impulses somehow. Though the likelihood of nerve impulses actually supplying enough energy is unlikely, but lolscience. *picks one since it's not like there'll suddenly be an explanation before the end of the series*))
It all runs right off the central nervous system, but it's pretty complex. [A little begrudgingly:] Honestly, we wouldn't be able to have this kind of technology without the aid of alchemy.
It usually takes about three years for the required surgery and full rehabilitation...though I know one who did it in one year...It's a quite painful process, so not everyone opts for automail back home even. Both the surgery to prepare the body for the limbs as well as the moment the limbs are hooked onto the central nervous system can be quite painful.
Hopefully with the advanced medicine that Sentience has here, it'd be even easier for someone to adjust, however. [Not that she actually expects to have any new customers here, but if someone does show up, amputated...]