Iron Man
Hi, Horkana. Always good to see your name on an edit!

My concern is that runtimes are notoriously difficult to pin down  it's one of the banes of my existence in my capacity as a film critic. If WP:FILM doesn't require a cite for runtime, I'm perfectly cool with that, of course. It's just that in practical terms, I've found that for almost every film, different sources given different runtimes, and so it'd be good to know where a particular number came from. You have more experience in film-article editing, so I'll follow your lead  whatever you think best. Keep up the great editing!