Feathers, vanes, and turbonocks all fly through the whisker biscuit in an acceptable manner provided you use the correct spine arrows. Best results that I have had were when the bow was set at an even tiller and the arrow nocked at 90degrees to the bowstring. The rest should be adjusted for windage by grouptuning for the narrowest group. On most righthanded bows the nock travels forward and to the left about 1/8" so it makes sense that on most bows the optimum postion for the rest is often about 1/8" to the left of the centerline of the bow. The soft rubbery kind of vanes flop around way tooo much to be used with this rest, stick with the harder shinier kind of vanes for the whisker biscuit. Good luck hunting!