0 and 1, and get some help on the spring install. it will be a pain in the butt to get it on by yourself. lots more side pressure and preload. i did it by myself on one sled, using tape to hold the secondary closed. it was ghetto, but it worked. still a pain in the butt. ski
Doing it while the secondary is on the sled is much easier IMO. I snuck the belt behind the inner sheath and that kept it from opening up.