I'd like to add when you spin test your arrows, be sure to spin test both the point end & the nock end. Especially if you are shooting carbon shafts, and of the cheaper variety. Make yourself a jig if need be. Simply V-notch out a couple of pieces of wood, and fasten them to a bottom base. Mark a dot on a wall, and spin both ends to see if spin perfectly. Its important to check the nock end as well, it can be off just as easily as the point end. I've done this with every carbon shaft I've ever bought, and you'd be amazed at how many are off. I sometimes have only found 8-9 shafts in a dozen that are perfectly straight. Do mark each shaft with a number to keep track.