I'm in Texas, and treat mostly St. Augustine turf. When I was in the business in colorado, we used bluebirds and classen split-drives for Kentucky Bluegrass. Now that I'm in Texas, it's much hotter and to make matters worse, the st. augustine is very, very thick and difficult to aerate. The grass is 3-4' tall, with thatch layers in addition. I am looking for my first aerator down here and am considering classen split drive, classen ride-on, or anything else that would work the best. I care for mostly residential lawns, averaging 8000 sf. some are much larger, up to 1-2 acres, but not sure if they'll have me aerate. If anyone with experience aerating st. augustine can advise, I'd greatly appreciate it.