first off let me say it' s good to see someone from my old stomping grounds here ,i grew up in west orange. moved out here four years ago! anyway.i was going to buy th nv for my old xi until i picked up a bow that had them on the old xi was heavy enough ,they added some weight to the bow (a pse primos) i don' t need them on my hoyt ,but from what i understand if you don' t mind a little extra weight they work real well[:-]