OK, it finally happened to me. I've been racing since Jesus was riding Pentons. And I've been hurt before - a lot, but have never had a head/neck injury like this. My Doc says that if I'm going to keep racing that I'd better wear some neck protection because one's neck shouldn't be shaped like a pretzel at the end of the day. So for you guys that wear EVS stuff; what's the difference between the RC1 and RC2 models of collars? Do I have to fasten them to a chest protector?