I have a pretty good grasp on how to use the grading tools. What I need to know is what tools would be best to use. My boss has given me a bunch of spot elevations that I need to use to make a surface model of the Market Square Area. I have a pretty good start on the area using feature lines but keeping up with all of them is a real pain. It becomes even worse when there is a change. I can not figure out how to use a corridor in the area and I have never had real good luck with the grading creation tools. Ususally they blow up in my face.