RE: Arrow Spine...myth or fact?
For me it would.
A good way to check/find the stiff side of the shaft is to shoot through paper at a 5-6 yards. Note the tear in the paper and then rotate your nock 120 degrees (to the next fletch) and shoot again. See if the tear in the paper changes. If it does then you may have a non-uniform spine and you can set that arrow aside. Do this until you find a shaft that doesn't have a change in the paper tear when the nock is rotated. Use that shaft to tune your bow. After you tune your bow with the good shaft then get your "bad" shafts and shoot them throught paper, while rotating the nock after each shot, until you get your best (least) tear. Then you can likely use that shaft.