I personally find it AMAZING that people can actually compete in 3-D and spots with carbon arrows!!! I mean really...they are all SO bad....there must just be PILES of the things laying around that shooters thew away trying to find " good" arrows.
I concider myself to be statistically the luckiest man on Earth!!! I have bought 12 carbon arrows and got 12 that were to " spec" !!!!! Imagine that...I should be in the book of records or something!!! Guess I better go buy a lottery ticket.
More proof of my LUCK? I can actually get my broadheads to hit where my feild points do out to at least 40 yards!!!! You read right, FIXED Muzzy heads out to 40 friggen yards. Time to hit the dog track!!!
MORE proof? I don' t even match my carbon arrows " stiff side" (read most out of round side) when I pull all this off!!!!
MORE proof? I got my first ever 300 game (38x) with carbon arrows...and I didn' t even number them to find all the BAD ones!!!
MORE proof? (getting sick of this yet?) I even use (shhhh...don' t tell anyone) PUSH in nocks and threaded inserts!!!![][][]

OK... you get my point (I HOPE) fact remains, that the arrow is the LEAST important to tune. ARCHER is #1 Bow #2 arrows #3....by a LONG way.