I have a QAD rest and I think it is one of the best rest I have ever tried. I have used the Muzzy zero effect and like the QAD a little better, and I like the muzzzy. As for turbo knocks aren't they the ones that have hard plastic fins? If that's them I would be wary of them. ANY contact would be bad. If the drop away is working perfect they should work but if there is the slighest touch from non forgiving fins your arrow will go wild. I would stick to vanes or feathers my self. Jim