[ Had you caught him just after arriving, nope not in the least. But he's been in Cadens for several weeks now, enough to learn a little more about what Garrus might be referring to. His eyes widen as he tries to think that over. ]

I heard them talking about such things when I was helping some people clear out old equipment from the mines. They were talking about redoing them, improving them and making them better. Those sorts of engines?