Hey guys - any of you heard or used these things. I saw them yesterday at a Sports show. It is basically a nock that slides into the nock insert and has fins on it. It eliminates the need for vanes or feathers on your arrows. The only requirement is that you have to use either a whisker bisquit or fall away rest because they are a hard plastic. The dealer claims that he achieves 7800 rpm with these nocks which really stabilizes the arrow quickly.
Also, how do you guys that have them, like the whisker bisquit rest?