Speed nocks?

[Lab Rat]

I noticed that my Onza 3 and Alien Z have something that resembles a couple of nocks covered with heat shrinking. I am assuming that they are meant to act as speed nocks. Should I assume that they are in the best possible position for speed? Seems like something to tinker with - hmm.

[elkslayer4x5]

I noticed that my Onza 3 and Alien Z have something that resembles a couple of nocks covered with heat shrinking. I am assuming that they are meant to act as speed nocks. Should I assume that they are in the best possible position for speed? Seems like something to tinker with - hmm.

That is what they are, you'd have to have a chrony to find out if they are in the best spot for your setup. By tinkering with them you could get another 3-5 fps, ......maybe.