We have a magna matic, and just leave the blades on the disc, just put them against the disc and sharpen, just like sharpening 2 sets of blades at one time, a little pain in the neck, but no more than x-blades. I was paying $110 for a set of dixie chopper x-blades at the chopper dealer in Sulphur Springs, they didn't seem to last very long, set up just like a standard oregon blade, no fusion treatment or anything. They seemed to make my motors work harder too, so far I have been using megs this year, and I have 10 other guys running them too......so far we are impressed. The main plus is the sheer start of the blades, isn't near the strain of the doubles, I guess cause the disc makes up most of where the blade would have been. My only negative is the rattling noise when the blades are off driving around, and they seem to wear out the lift on the blades more than the fusion blades we run stock, other than that they are cutting dudes down here. I talked to some of the cut specialists at bad boy, and they said the blades didn't work very good in their area, but down here they seem to cut well. oh, my complaint is the blow out is more with these, especially being as dry as it is, they are throwing dust everywhere.
The cost isnt really a factor unless you get them and dont like them, its only $60 to replace your blades on the Meg-Mo's, so no more than any factory blade... Seems in the past posts people usually love them, or flat out hate them.
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