I agree with DavidMill on this one. Another disadvantage to one pin is say a deer shows up at 30 yds and say theres a branch hanging down between you at 10 yds. If you plces your one pin say set at 25 or whatever a little high on the deer its going to appear as though you will clear the branch and have a straight line to the deer. But you will hit the branch and your arrow will be gone. with a 10 yd pin on your sight you would see that the 10 pin was settled on the branch and although your 25 yd pin was on the deer you arrow will hit where the ten is settled first. I speak from experience on this one.