To Wolfman's point, do some surfing on YouTube to find videos of one of these in use. I think it's common for adjacent blades to have 'opposite' angles. One blade throws material to the right, next blade throws it back to the left. Will be difficult to control if all of the side thrust is in one direction. [Thinking of how much I have to countersteer when I'm pulling a big angle blade full of snow.]
Also, swing by your local township maintenance yard. They might have used grader blades that they'll give you for scrap price (currently very low). When I was a kid, Dad got hold of about 50 of these, and we set them in concrete as fence posts for the feedlot. Was pretty easy to bolt cattle panels to them. They're tempered, you can't cut them with a saw. All of the county roads were gravel, so there was a surplus of these.
-Paul