Boris, sorry I didn't answer about vane orientation. I shoot cock vane down. Depending on the rest you have, you may also be able to extend the arms out a little to gain clearance. If you do this you may have to adjust nock point as well. When the NAP drop aways came out I tried one, and haven't looked back. The arms hold the arrow very well. They also provide plenty of clearance. Check out the 4000 if you get the chance.

Phil.