I think that used to be the case. But there is certainly a visual seam on every X7 I've used in the last few years.

SA, I agree on stiff spines you wouldn't notice much difference. But I was surprised on how much that spring force was as I approached the full travel. Since I deal with youth/light poundage bows and arrows I occasionally have to mess around with light spined arrows. Do I want to trade? ummmmm.... not just yet.

With the bearings on both ends and on the hanging weight, it's very smooth on the rotation of the arrow. I tinkered with my indoor arrows on the tester last night for the first time. They were all within .004" of each other for deflection, but the fun thing was seeing the stiff spot on a few of the shafts. Some had no stiff side that I could see, but a couple of the shafts did a .002-.003" wobble of the deflection as the shaft was rotated.

I'll admit I'm very fortunate to have all the toys I do. My basement is better equipped than most any archery shop I've been in.