String nocks have always driven me nuts, just don't like em, so wierd as I can be for along time I've used masking tape wrapped around my string right above where I place my arrow instead of a nock, and it works great!
Also got a rinehart 18-1 target, I shoot mostly broadheads, and could not ask any more of a broadhead target.
3 rivers has a few different kinds of limb protectors, and I find the soft rubber type that come in tan, dk brown or drab green to work much better than the better looking extra hard rubber, almost plastic type, they are so hard sometimes they pop off at the shot and I can't find them, I quit using those in place of the soft rubber ones mentioned above.