I don’t mind “mettle” (I was thinking “bravery”, though now Wiki-search reminds me that “I Crush Everything”‘s narrator would like to get “brave enough to take you into [its] arms”). If you’d asked me to name the one JoCo song that names “mettle”, CBAM wouldn’t have been in my first, er, ten guesses, I feel certain. (I would’ve run all the way through “A Talk with George” in my head, I think, then floundered.) Well done, Ben!