Step 8: Downward slope.

Picture of Downward slope.
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Here you are going to take your file, and gradually slope the material from back by the twist getting thinner until you reach the lowest point in the most rearward valley of each pick. 

Again, a picture is worth a thousand words here. This takes a while, but perk up! You are getting there. Soon, you will be the envy of people everywhere.

If you are having trouble seeing, open the image, and zoom in. Don't mess this up. I'd hate it if you had to start over, and your underwire supply will begin to dwindle.