I've been using the 21 inch Ego self-propelled mower for about a month and a half now. I'm noticing that a lot of the grass is starting to look matted down even though I change my mowing pattern (I use 4 different mowing patterns and rotate them) and so I'm not always putting the mower tracks in the same place. I think with gas-powered mowers, they must suck the grass up better to a standing position before cutting it, because I never noticed a matting problem before. Does anyone else have the same matted grass problem? Has anyone tried the new high lift blade and seen if it pulls up bent over grass to a standing position in order to cut it, better than the standard Ego blade? I'm wondering also if my matting problem has something to do with my cutting the grass at such a tall height. I cut it at 4 inches. Perhaps if I cut it at say, 3 inches, that would solve the problem. I'd appreciate any advice you can give me.