Has anyone every used or have any feedback on the Z-plug from LT rich products www.z-spray.com. We are considering purchasing one for our LC business and wanted to get some info from you guys if anyone has any experience using this machine. Aeration is a growing and profitable part of our business but I'm not sure how long my back can take using the traditional aerator. It is a pretty large investment so i wanted some thoughts before moving forward. Any thoughts or feedback would be appreciated.