In order to correct arrow flight while paper tuning bare shafts, you need to know which way the nock end of the shaft is flying. However, I couldn’t distinguish which end of the tear was from the field point and which end was from the nock. To solve that problem, I apply lipstick to the field point. It will leave a mark on the point end of the tear–which tells me if the nock was flying left, right, high or low–then I can make adjustments accordingly.
Another tip: Get large sheets of paper for tuning from contractors who are throwing out their blueprints. Secure the paper tightly across a frame or an empty cardboard box so that the arrow goes through the paper.