I was really tempted to write on the 60-some unmarked keys, then tell the owners that they had to get a new piano since there was no place left for service notes. <g> JF <div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Back when I used to mark tuning dates on keys as a matter of course, I NEVER had ANYONE object to this. They ALL realized that the permanent service record in the piano was a potentially useful thing, like the oil change date sticker in their car. They still do, but I don't usually mark on keys anymore. Ron N </blockquote></div>