Fox,
If I understand your questions, a right wing fletch twists to the right as you look from the nock to the point, your single bevel broad head will be to the right. Bevel one edge, flip and bevel the other. Opposite for left wing fletching and broadheads. I think I read somewhere on this site that most commercial fletching is right wing because the pros get all the left wing fletching. I reserve the right to be wrong. If you can get a wing with the feathers attached, it will help you immensely. Just be sure to match your Fletches on the same arrow, along with the bevel.
Hawkdancer