Had a prospective customer call regarding overseeding. I went out to look at his lawn and found that the grass was fairly good considering the lack of rain we've had here, but the lawn was extremely rough. He described it as walking on golf balls, and it felt about like that. It seems that the low areas need to be about 1 1/2 to 2 inches higher. What would be the best way to level the lawn out some? I thought about aerating and then bringing is some dirt and use some kind of drag harrow to drag the dirt in to the low spots to level out, then overseeding, with the thought that the existing grass should survive. We are talking about around 4,000 sq ft. Ideas, coments?