You want to pick a spine of an arrow that bends around your riser. If you have a good release, and the correct spine, your feathers nor your strike plate should have any marks on it.

Here is a good video showing this. A hand release induces this bend. A mech release does not. But you have more of a up and down ossilation.

http://www.youtube.com/watch?v=WzWrcpzuAp8