OldMax,
Nice job of using what is available!
David from jax
Roundbale,
Building a Duragrader or road maintainer is an interesting project that will require pictures to be posted at each step of the way.
Some people like them, some think a box blade with training wheels will do the same or better job, but if you build one and take the time to get all of the angles right, you won't be disappointed with the results. Grader blades and the steel can be purchased from several sources, but what size and how heavy of steel to use depends on your tractor.
I don't really have a use for one, but decided to build one to maintain my sister in laws road. Since the other people on the road gave me a hard time about "how" I was maintaining their road, I decided not to build it for now, and quit working on their end of the road. I have the grader blades and steel, just waiting for me whenever I actually get a need for one.
David from jax