I bought the bigger turbo nocks at the harrisburg show. They flew very well, but they were very noisy. You can here them all they way down the range. My other concern is that if the hard fins hit an obsticle. Vanes and feathers would give and not deflect the arrow as much. When I shot at a dart system they would pop off. I tried them on the new whisker buisket and they pushed the bristles out.