How do you like your First Choice aerator? I have a Bush Hog 72" with about 400 lbs of concrete added. I found it used at a great price a few years ago. It does a decent job on my black clay if I time it right with the soil moisture. Mine just has straight 3/4" pluggers, not curved spoons. I get a max of 3" penetration, probably more like 1 1/2"- 2" for most plugs. I keep watching for a used Ryan or Toro with the independent gangs/weights