Well today I tried the MEG MOs on my ZD21. The grass was not over 2 inches tall, but was wet from rain yesterday evening. I wish I had my camera today to take a photo of the grass caked under the deck. 2 to 3 inches thick. The grass stuck to the deck until it got so heavy or I hit a bump and then the crap would drop in a big manure pile.The blades dont seem to have enough lift to them. I ran them for 1.5 hours and took them off and put the factory blades back on and finished the job. The factory blades worked great as usual. Very little sticking to the deck and no manure piles. Also the MEGs dont require any more power to run than normal blades. At least with my Kubota. So anyway I will be calling Roy at MEG MO tomorrow.