The C2 is a bit different, Don - they went with a two-patch spinnaker, which means the bag is a little longer (92-inches instead of 78).

Bob, your SNU does not need to be riveted on. You can do it if you want, of course, but it really isn't necessary. Three zip ties and seven wraps of electrical tape over each tie. Dennis has an instructional video that is in post-production now. Your bag will extend aft past the front beam. I'll get some pics for you.