I only saw a few on our line (50+) - Didn't count, but pretty sure it wasn't 9 riders. But, there may have been people scored in our class that were on other lines. Did not look like it was well policed as far as who should have been on what line. I know there was some confusion with some riders. My bike would not start, so I saw all riders on my line leave - seems that there were more than just three. I'm not really fond of this "Co-sanction" double-up stuff. Kinda screws everything up from Race format to classes to scoring. Other than that, I enjoyed the racing.