From what I've seen, that's incredible for carbon arrows. I've never checked carbon techs, but I've never seen any carbon - aside from ACC's - with that little variation. The ones I've checked (Beman, GoldTip, PSE, Arrow Dynamics... to name a few) all had spine variances averaging between .010 and .020" on the same shaft (some even worse - much worse), and up to .050" variance from stiffest to weakest in a dozen.

I swear this is the truth, believe it or not, my cedar arrows were straighter and more consistent in spine than the carbons I was working with. But it's been a couple of years now since I went back to aluminum and quit beating my head against the wall with carbons. Maybe they've improved?

Sorry, muzzyman, but even though I did a lot of spine testing on carbons, I never looked inside them to try and match spine readings to a seam. Never thought to even look at that, since I thought they all had a bias wrap inside. That kind of construction wouldn't show a straight seam.