Got the new $50 Craftsman DLT 3000 bought at a yardsale up and running. Couple of belts, two new front tires, deck spindle and an oil change. She is mowing fine. This mower has two mulching blades on it. I took them off, wire brushed them and then sharpened them. Balanced on a screwdriver to make them sit right but my question is for regular mowing of the yard. They are heavy and I"m wondering if they are even needed? Never used them before