RE: Walk-Back Tuning ?
paper tuning is good for setting up center shot but and bareshaft etc... but if you think about it, paper tuning is nothing close to the cure all for tuning. if you shoot an arrow from 20 yards through the paper, what do you have... a bullet hole. your bow still may be out of tune even though it doesnt show on the paper. i think there are plenty of minute uses for paper, but not for fp/bh tuning. jmo.
Derek