That would be helpful, yes. The general parts may be more useful; you needn't sacrifice any of it to my education.

[In other words, don't melt any down just for him, although he would accept a tiny scrap of it, purely for education's sake.]

[At Donatello's question, the faintest smile flickers across Edward's face, there and then gone.]

I don't suppose you or your brother has any way to fix eyes damaged by mustard gas, do you?

[Probably not, so he keeps going.]

You said that you study engineering; if you have any ideas for tools to help me navigate, I would be deeply grateful.