Alligning the blades does absolutly nothing to the flight of an arrow good or bad. You would have to be a physics genus to actually align the blades with the fletching. 1)you would need to know how many rpm your arrow is spinning 2)calculate how much your arrow spins before the vanes get to where your blades were 3)know the exact speed of your arrow 4)if there is any wind then the vanes will not go through the wash that the blades created anyway 5)All of this means nothing when your arrow slows down below the speed you calculated all of this for anyway. There are so many uncontrolable variables that they would never actually be alligned. But if it makes you feel better and you have the time to waste then feel free.