I bought a grate, the kind you walk over to clean you shoes with the open air space below. It came from a old school building, I paided $10.00 at a salvage yard. Hooked a piece of chain to it and used a threaded link to tighten around the hitch ball on my ATV. Then I put 3-large cement construction blocks on top and secured with some bungies. Yup a real REDNECK special. While it doesn't remove large humps in one pass it will do most of the light to medium grading work on my driveway. Gets rid of most of those weeds too. I have also found out that when you do this is very important. Trying to grade when it is dryer than a Popcorn Fa#% is to much work. Slighty moist, like 2 days after a rain helps alot. This in no way a substitute for Greybeards rig just an inexpensive set up that does a pretty nice job. Buckfever