I am the Race Director for NASA and the CMC class is a great class and group of racers. I raced ITS a few years ago. It was lots of fun but I felt unwanted by SCCA since I was "only" in a regional class. I considered a CMC car but my duties at the races make it hard to get on track. What make/model are you looking to build? I am considering building an EP RX7 or 240Z.