Yeah, I know. Post production is a minefield; the time to discover you didn't quite get a shot right, or not enough of a shot, or there's something wrong with what you have got, and the principal cast are no longer available to tidy up the mess so you have doubles - I don't have a problem with that at all, usually, but if it's any old dude's wrinkled ass I want to see then it's his not someone else, just sayin'! I don't care if it's drooped to the floor, still want to see his!