Good info Arthur. That is kinda what I was thinking. I' ve been using a homemade bearing setup to find the weak spine side on my carbons and putting it in the up position. It' s pretty obvious where it is so I have to agree with your somewhat high tech findings in my own somewhat low tech way. There almost always seems to be two weak planes n the shafts about 180 degrees apart, but I can generally tell which one is weaker. I tried the same thing with some old aluminum arrows I have laying around and most were hard to find a weak side on.

So I wonder how important this is. If your arrows have a weak side and you index them all the same then they should all flex the same direction during the power stroke; given the amount of deflection is consistent (which I read it is not on my gold tips according to your findings-correct?).

So to make it simple, what are your recommendations on those carbon shafts given what you' ve found (the big picture not spine only) from best to worst?

It looks like I need to spend some more money and give the aluminums another look. Those X7' s look pretty affordable compared to the ACC' s.

It' s nice to see you around Arthur.

-Chief