I am looking for walk behind aerators that do not require a visit to the back doctor after each job. (kinda cuts into profits) Has anyone owned a good aerator to recommend maybe old greens aerator ryan, toro, something besides the jerk and pull at the local rent shop. We have rented so far but the machines are just small and unproductive and I got spoiled with the toro greens aerator 10 years ago. Somebody got a used one sitting around? Thank you for your answers! Mo,mo,mo, yo self quickly to de bank!