Originally posted by warden415: Got the spine tester all put together and ran several arrows through it. Seems to be very consistent and easy to use.. i tested several of the spines on the same type arrow. Did notice a small difference. Also did notice some differences on how the shafts were oriented on the tester. Even the carbons. I'm not sure my shooting is good enough to benefit from a few lbs difference. . But i will orient the nocks now to match spines