No I did not mispell anything, SORE AERATION is correct. After aerating all of my properties in Sept I took a nice 3 hour drive to NY which turned into a 6.5 hour drive thanks to NYC traffic. The next day I could barely walk. It didn't get any better during the trip and the ride home was almost unbearable. Saw a chiropractor and he said I sprained my back, no work for at least a week, and I have to see him every day for treatment for the first week, who knows how often after that. Anyway my point is this. For those of you who price aeration in my market any less than $15 per K your crazy. A healthy back is worth much more, and costs much more to fix. I will be aerating again when I heal, and will continue to charge top dollar for it.