YEah, carbons do definetly have a strong and weak side to them and finding this line will definetly help with arrow flight.

And there could be a case for orienting all of your broadheads the same in relation to the other broadheads so they are all leaving the bow the same way.

However, concerning the fletchings andblades alignment....... The point I was going to make is that unless a person is in a 100% perfectly controled environment there is absolutley no way any one could figure out where to align the vanes in relation to the blades on a broadhead. Once the wind direction, arrow speed, arrow rotation speed, arrow trajectory, relative humidity, air temperature, altitude,or anyofa number of other variables changes the calculations one would have to make would have just been thrown out the window and completely useless.

In other words....... It is absolutely impossible to get the blades and fletching aligned to fly through the "same air" or the "clean air" between the bladeswith out being in a lab.