Ah! That was just right. The structure and the pace and the language all work together perfectly, the whole thing just flows beautifully. For a piece written around explosives, it's very calm. And Ray and Fraser really sound like Ray and Fraser.
I should be a bit more coherent, but I really need to go and read this again right now.

ps there's a typo in 'How to identify...' - He'd shown Ray the contact