One of the reasons I like the micro adjust features on some rest. I have paper tuned and had a great center shot, a bullet hole. But shoot out to 40+ yds and the arrow did not hit center.(not me) What I know happens when you line things up, the cams are at "rest", then things change as soon as the cams roll. The lean in the cams can be so small that you cannot see it, but the arrow shows it, by not hitting center. I have placed an arrow on the bow while in the draw board and as I pulled the string back I watched it move from the poi. The point was not more than 1/32" but we all know what happens if you draw a 1 degree line-the further you draw it the more it will be further! Example is a pilot that flies off just 1 degree in 500 or more miles could be in another country, or state. I tune a lot of bows, and the drawboard happens to be one of the most used tools I have for setting up a bow correctly. Now all that being said when I find the cam lean at full draw, I then adjust the rest ever so little, that is why I like the micro adjust so much.