Black frog, was your spine test, for the range on a dozen, or was it the maximum difference between the stiff side and weak side of the worst arrow in the dozen?

From what I can tell from my spine testing, aluminums and aluminum/carbon arrows don't need to be spine tested. Putting the cock fletch on the stiff side, when it's only .001-.003 difference, doesn't make a noticable difference for me. All-carbon arrows are a different story, expecially the lower-end ones. I've measured as much as .085 variation on some dozens. I've even seen single arrows with the stiff side being .030 stiffer than the weak side. I need to test more brands, since I've yet to come across an all carbon arrow, where the spine tests don't make you cringe. The ones you tested appear to be much better than any I've checked.

On the positive side, I've gotten amazingly good flight off even these poor arrows, by culling a few of the worst and then aligning cock feathers on the stiff side. Then, if the spine is close to weak for my bow, I turn my bow poundage down so they all shoot on the stiff side. In the two years that I've been doing this, my broadhead groups have shrunk dramatically.