One item that confuses the hell out of me. For those of you who said, "in the center, as I don't want to have to climb a ladder or bring it in to check what color it is...." -- You have heard of these things called "Dimmer Hookups and Channel Schedules", right? There's also this thing called a Light Plot. All three list the gel in each fixture. Just sayin'.... John Mckernon must be facepalming over this thread.
Mark, all that paperwork does is gets the color cut, framed and headed towards the units. Then someone doesn't pay attention and puts an R04 in a unit on 1E that is supposed to be an R304 and you wonder why you now have a spare frame of R304 in your hand and are missing an R04 for the 4th electric. Having it labeled so you can see it helps you find the error.
Humans being human are prone to error and it's just another method of helping to find and eliminate errors before they become problems.