One other thing to check and watch for is at what place in your draw cycle does the rest come up to full height. If it is coming up too late in the draw the rest will not support the arrow long enough on the shot before the arrow has gained enough speed to keep it going in a straight line. The rest should be at full height by the time you get to 1 1/2 inches from your full draw. This will hold the arrow up long enough so the arrow can gain enough speed and the arrow will go in a straight line instead of dropping down.