Some of what I see over there is a little off, and sometimes there is some really good stuff. That link about Walkback by "Nuts&Bolts" though leaves a little to be desired IMHO. It's decent until he says "If the pattern gets more crooked, then adjust in the other direction." Then I'm in disagreement. When doing a "walkback" if you get a pattern that looks like this " / " then you need to move the rest to the right or toward the riser for RH shooters, away for LH shooters, and if you get a pattern like this " \ " then you need to do the opposite. In short, move the rest in the direction the bottom arrow need to go, and they will go, little bit at a time sometimes. This is pretty much how I start out with my bows after I "eye-ball" everything. After that, then I screw on some BH's, spin them and make sure they spin "true," and shoot them, seeing how they impact in comparision with my FP's. If the BH's hits low, then raise the rest a "TINY" bit, or lower nockpoint and try again, and vice versa; if the BH hit's right, then move the rest left, and re-shoot, and if BH hits left, move the rest to the right. Basically with sights, you "CHASE THE ARROW," and with rests, you "Guide the arrow."

Now this is all stuff that you need to do AFTER you get things roughly set-up and ensure you aren't having any contact issues, etc.