OH, the dreaded dragon teeth got you. Yes, they are nasty.
Ya, racing against one is not as much fun as 5 or 10 or 20. There are a few World formula packages available around the track. We could use more drivers in the heavy division if that works for you. Not as fast as the shifter I know, but it teaches you to be smooth. I was turning 35.6's Sunday, Lights are about 34.7's I believe. If you get a hold of a new disk and are going out let me know ahead of time and maybe I'll get out on a Saturday.
And if it is still straight with no major chunks or cracks all the way through you can still run it. There are plenty of chipped up rotors running out there.