I usually don't change the rest that come with the bow,i have seen no differences in performances or fine tuning.I use the silencers I have on hand also here not much big difference. About the brass nock I keep it till the bow is fine tuned,because it is easy to movealong the string,then I replace it for a tied string because it doen't demage the glove.
In the year I have cut down the dimension of my tip protectors since a too heavy one can change the tiller.In the last few months I replace the 18-20 strand strings for a 8-10 skinny,in some bows it helped to quiet down,in others it didn't look to make a difference.I guess most guys like to play with their staff.