ORIGINAL: lrhuntr
Several companies already have such devices installed on the string. If on one of your cables, down next to the cam you have what looks like a piece of shrink tubing, chances are there is a brass nock or two in there for just that, gaining speed.
Mobow, I've always wondered what that thing was. I got one on my Reflex and it hadalways bugged wondering what it was. Now I know, thanks.
Yes, Reflex is one that does that. It actually works, though it goes against logic. All I can figure is that the extra weight, placed strategically, helps "pull" the cam over, propelling the string faster. Oh, and you're welcome.