how many of you are using them. and did you switch from using ryan or claussen. the first aerater I ever used was made like the plugr and as far as I know they made them. that was back in 1979. I just recieved there promotional video and I must say the Plugr looks vary easy to use. and I could see aerating all day and not be as tired as I would be if I ran a ryan all day. the price list I just recieved puts the PL800H pro 30" at $3,150.00 but I think I could get by the sticker shock if I didnt have to work half as hard as you do with a ryan.