i just used that system today in fact and all i have to say is awsome, i cant believe all the fartin around i used to do all the past years trying to get it "just right". today i just shot, zeroed it in and shot again, dead on, then i moved the crosshair adjustment up 14 clicks to make it shoot 3.5 inches high, shot again, found it shot 4" high, turned it down 2 clicks, shot one more time and it was perfect. i shot about 30 rounds after that and everyone was where it was supposed to be, i got groupings anywhere from 1 1/4" down to all three shots touching.