OK,, got a major Bozo here who says he can see the difference after he sharpens blades (60" Lazer Z) twice, so he tosses them out and gets new ones. This is the same dweeb who quit running doubles because the grass packs under the deck too much. This is a dry year and it bothered,, after he ran them all last summer, when it was wet and sticky all the time. And he insists on keeping blades in sets,, says he can see the difference if he mixes sets. Am I wrong in thinking he is somewhere from around Alpha Ceti 5 or something?