I purchased a 54 inch Lesco Z-two. I also bought a mulching kit for it. It took ordering three kits before the dealer sent my mower off to have a "pro" install it, said they were machined wrong or something. Anyways, we used it for the first time the other day. My wife used it on the first yard while i trimmed. When I got to the area she had just mowed I noticed several areas that had not been touched, so I went and got a push mower and finishe it up thinking she was sleeping while mowing or something. Well the second yard I used it and I quickly noticed the same thing. Its almost like th middle blade isn't even turning. I was mowing over weeds (half speed if that) with purple flowers on them and after I passed the little flowers were still there like nothing had happened. The yard looked like crap. I had to walk around with my weedeater and "mow" what my mower didn't. The grass and weeds were not tall so that was not the problem. Could someone tell me what I am doing wrong. Or is this mower just a pile of crap. Last year I used a residential 50" cub cadet. That thing cut like a champ compared to the Lesco. Did I make a mistake by putting the mulching kit on? I can't go through the summer with it cutting like this. Please help.