1st of all new to the site. But it seems as if i made a million dollers by just reading the post great info here.. My ? is ... When you lay sod down why do they rototil the dirt then lay top soil down level it remove more dirt and then lay the sod down.. I was taught this way so I always did it. But to me it would seem smart to to grade and remove the old dirt (with mini skid steer)and add top soil..... Thanks..