Mike,On the Boo or cane shafts; I'll leave it about 35".Put the tip of one end against,say a coffee table.And the other end on the floor. Put some slight pressure in the center,rolling it with your palm.When you roll to the stiff side ,it will spin or flip real quick in your hand.If you zero in on the spot ,you can mark it with a Sharpie and then orient your nocks and then have a starting point for your feathers. I hope this makes sense?If not,I heard you could put them in water and the side floating down was the stiff side.Never tried it,I didn't want to get 'boo any wetter.