Regarding those blades...I have a set on my exmark. I really like them as they seem to cut up the clippings to a finer consistency without making so much vacuum that the crap comes out from in front of the deck as well as the chute. The other high lift blades will cover me with debris....makes mowing miserable. But....we have very sandy soil, so I know that plays into it some. That sandy soil also affects the longevity...the top of the "sail" lift area of the blade will get paper thin in a season.
Allso...make sure the front of the blade/deck is 1/4" lower than the rear. The rear hangers have an adjustment on the j hooks w/ springs .The part that attaches to the rear deck
Allso...make sure the front of the blade/deck is 1/4" lower than the rear. The rear hangers have an adjustment on the j hooks w/ springs .The part that attaches to the rear deck