I have a 2011 rack attack (exile) and have the 28" module on it...set the draw stop to touch the limb at the point the cam stops rotating....when measureing the AMO draw length, I get somewhere around 28 3/4"....yet it feels like my correct DL of 27.5....anyone ever do any measureing with these acu-trak modules? di you find them to give the correct DL?