I'm thinking of purchasing a John Deere Dethatcher/Aerator combination unit, part no. LP39089 to be towed around by my JD X570. This combo would provide two pieces of equipment at a reasonable price. It would probably also pay for itself in less than two seasons rather than having to pay someone to do the jobs or rent the equipment. I couldn't tell from the online pics if the aerator actually was the plug type or not. I understand the "spike" type is rather useless for aeration.