I don't know if its a staightness issue or a spine may be both. I do shoot with a finger release so I am thinking the spine issue makes sense. but come on $80 a doz. I do expect better. And man what pain to pull out of a 3-D target and they are a tad louder when in my quiver and when shot. If durability is the only reason to shoot carbons. then that is not a good enough reason. I can say i will probablly order some more XX78s. .0015 staightness and les than 1% weight differance for $ 56 a doz. I don't want to be wasting any more money on what works for some one else. as far as my Korean made terminators I don't know what to do with them. And I agree with paul usually when I bend an aluminum is something stupid. Oh and on a light note. I am impressed that CXs can with stand a brick wall. Because thats about all I could hit with one.