I've got a customer with a small front yard to re-seed. it's about 80 by 80. I don't want to use any chemicles to kill the existing lawn. my plan is to mow it really short and the loosen up the soil with my rock bucket and york rake and then spread 4 inches of new loam over that and seed it. Anybody see any problems with this? are the clumps of sod going to get in the way?