It is good, but I can't remember what size cam I placed - sorry!
What I do remember is that the traverse out of Coldfinger (to give it its correct name) is perplexing. You are on comfortable ground whilst you try to fathom it out, but it took me several forays to unlock the key. Never fell off, but was definitely stumped for a while. Good gear at the undercut, and the headwall is just good fun, on excellent rock.
Hasn't this (headwall) since been swallowed up by one of the full height bolt routes (which I don't think had been done when I led TFOI...)?
Neil