I agree and disagree...
I agree with the statement "Alligning the blades does absolutly nothing to the flight of an arrow good or bad". But, I disagree that it does not matter. The arrow can and will have good flight, but it might not group with the rest of your arrows. My proof (at least to myself), took 6 arrows (6 gold tip 3555 and 6 easton 2312). Matched spine, and found the weak spine side of the arrow. Fletched all six on the weak spine. Put inserts and broadhead on and spun tested them. 5 were lined up with the fletching, 1 was not. Shot for groups at 20 yards. The 5 that were ligned up grouped in the same spot. The 1 that was not was about 1" high right. Repeated the test with a different arrow as the 1 that was not lined up with fletching. Same results. The arrow that was different shot to a different spot (close to the other off spot but not exactly). Even the one that was "odd" before grouped correctly with the others. I did this with all 6 arrows (6 gold tip 3555 carbons and 6 easton 2312) and the results were the same. The odd one flew to a different spont than the group, and each "odd" one was not the same spot as the previous "odd" one They all had great flight (even at longer yards) but they didn't group with the others. Granted 1" on a deer at 20 yards isn't much, but I want to pick any arrow out of my quiver and know it will shoot the same as any other one. Will it make a difference in arrow flight? No. But, it will make a difference.