I moved the draw stop to various positions and measured the valley on my jig to determine the affect of moving the draw stop. The bow was set at 63 lbs. while measuring for the following graph:




Note that "out" refers to moving the stop away from the limb, "in" is moving it in torward the limb.

My data with a sample size of 1 agrees with Len in that I gained 1/4" DL by when moving the stop to the 80% position. The valley is also the largest at the 80% position. I can't imagine anyone ever shooting at the 50% position because it feels like there is zero valley and wants to take off if you even breath away from the stop. I read somewhere that twisting the cables 2 or 3 turns can increase letoff and give a little more valley. I am going to set the stop for my 27 1/2" DL and try twisting the cables to see if I can go from current 68% to 80%. Will need to wait until I get my press from WWAG.