You might want to check out this video of our new hydro walk-behind aerator. Just a few words to describe: fast, agile, easy to use... There is nothing like it! Oh, and it really is this easy. Tine spacing is 3.5" and pulls plugs like no tomorrow...it even has a 120 lbs weight kit for pulling good plugs in tough conditions. VIDEO If you already purchased your new aerators for this spring... Don't watch the video....it will be just create another case of buyers remorse.