Wen - I supposed I neglected to factor in the impact of the trailing hydraulic gauge wheel. With it, you can control overall depth of the blade very accurately. Then, with the hydraulic top and side links, you can set the blade to any angle of tilt forward and backward and side to side. To change the angle of the blade so it's isn't perfectly parallel to the tractor, i.e. so the right edge leads and the material you up with it flows toward the left end with the side plate to assist in crowning the road, you have to use the lock pin mechanism on the blade.
What I have found with most roads that need re-crowning is that the raised center gradually washes to the sides, where is usually stops in the first few inches of vegetation on the shoulder. To re-crown the road, you have to lead the right edge of the blade at a fairly sharp angle into the first few inches of shoulder. The right edge should also be a couple inches lower than the left. It will then cut the fines out of the shoulder, and they will flow toward the center of the road as they travel back along the blade. A side plate on the left side holds it there to keep you from leaving a pile of material as it flows past the end of the blade. On badly flattened roades, I like to drop an inch or two of gravel down the center, they pull the fines on the shoulders back up to the center in the manner described to fill in around the stone and stabilize it to keep it from rolling.
Mark