I have searched thru past threads and still would like to ask the question. I prepare the soil for seed or sod with a reverse action rototiller and follow up with a pulverizer then hand rake where needed. Everyone around me has gone to a Harley rake due to the speed with which they can prepare a lawn (which is much faster then me). My concern is with soil prep. The Harley only goes about 1" deep, seed requires 1-4" of soil prep for "best performance". Degreed Turf managers that I have talked to do not like the Harley as a single soil prep tool. And yes the Rotodairon sounds like the toll but $15K OUCH! What are your experiences and thoughts.