We sharpen our blades weekly... I could say they would easily pass for a dull knife blade. It's definitely better and easier on the lawn to "cut" the grass vs. just tearing the grass down to size with dull blades. The lawn is a lot less prone to disease and such.
If you want to get serious... http://www.amazon.com/MAG-9000-Profe...5226356&sr=1-2
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Gary
'49 Farmall Cub, '62 "Original, '70 73 w/402-D Haban sickle, '71 127 w/38" cast end deck, '73 149, '76 Sof76, '07 LT1045 w/bagger, '09 GT2544 w/bunch of mods.
5 Exmarks, Kubota B2920, blah, blah, blah...
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