I just used a landscape rake the other day for the first time and have some questions for you experts. 1. At what point in the landscaping process is this thing employed? Before seeding but after tilling? 2. What about dirt lumps? Do you need to pulverize them first to avoid picking them? 3. What is the optimum machine speed, i.e. how fast should those teeth bars be spinning? Slow, medium or fast? 4. Is it really important to pick rocks down to 3/4"? Thanks for you help.