Can anyone here suggest a pull behind core aerator? I am looking at the Bluebird, Turfco, and the Lesco. I will be pulling these with a 18hp lawn mower. I have several large properties and require a pull behind rather than a walk behind. Will the pull behind do as good of a job as the walkbehind? When I first started my business I purchased a cheap pull behind now I want one that will do a better job. Thanks in advance for your honest opinions.