...It was fine during the fighting but you're sewn up like a piece of fabric. My best friend would have a fit.

[In fact, he's pretty sure Bones has ranted about this exact topic too--how barbaric surgery and older methods of physical repair used to be. But the refocusing of Jim's attention onto exactly how automail had to work...He'd never thought about the mechanics really. He looks back at Ed and makes a little shrugging motion, a suit yourself gesture.]

So wait...an automail mechanic is also a surgeon? And she's 16. How...?