Pete, I had the exact same situation recently. A Guido Brothers cal course that I use for most of my measurements in Fairfield was paved over, so I remeasured my own. While theirs was 1,000 ft., the one I laid out was 300m. It never occurred to me that other measurers might use it, thinking it was the original distance. When I file the paperwork for the new course, I'll make sure to note that it replaces the old one. I will notify Pete Volkmar, who might be the only other measurer who might use it, so it doesn't completely screw him up on a future measurement.