RE: feathers???
Yep what he said about left and right wing. Just want to add to that if you fletch your feathers perfectly straight you can use either left or right wing feathers. Right wing feathers are much more abundant and easier to get.
Since going to feathers I will always shoot them. Vanes just don't compare. I even gave the NAP quick spins a try but feathers still seem to stabilize the arrow much faster than quick spins. The quick spins may spin the arrow fast but I truely believe that feathers still "grab" more air and straighten an arrow faster and keep the arrow straighter than any vane made.