Those are funny, Wilmer. It would be cool to come across an "artifact" like that!
In response to some of the above posts, I should reiterate that I was mainly talking about parts that will get used by other players eventually (in this case, rental music). I think it just comes down to having some consideration for the next guy who gets the chart!
Also, any marking that's neat and minimal probably won't cause any problems. I agree that advanced warning about mute switches and metric division indications can be very helpful and even totally necessary at times. It's these folks who treat the part like a damn coloring book that I'm taking issue with, I guess.
