1) When renovating existing turf areas. Do they incorporate the turf into the new seed bed or do you still have to strip it first? 2) Can you do a limited spot within an existing lawn and have clean edges all around, or is there a starting or ending edge that won't be neat? 3) First year full time. Been working on the side for years. Specializing in turf installs and reno's (now, not in the past) . I have a NH 33D w/ Woods grader box, renovator,aerator. I'm in it "for the long haul". Sell the box and renovator and buy a power rake? Or use what I've got for now and buy one once I've got money in the bank? 4) HEAVY clay soil here in N.Indiana, no rocks to speak of. Factor in deciding?