Check out TFOX's thread at the top, "Don't stop at Walk-back" Though I really like walk-back to get things where I need them, it's full of good info to get you where you need to be. When setting up sights, chase the arrow, if the arrow hits high, move the site UP, if it hits left, move the site to the LEFT. It's not that difficult in all honesty. Even I figured it out, and I'm not the sharpest crayon in the box.