Fender rollers. Not over hyped, unless you don't know how to use it. Common problem when rolling fenders is the metal tends to expand and flatten out across the width when the sides are forced through the roller. Especially at the edge where the lip of the fender is knurled over. Same problem at the front edge. If a fender is badly bent on the sides, it's hard not to stretch the metal, This problem can be eliminated, somewhat. I kept an assortment of fender "cut-offs." 4-6" sections of perfect fender sections carefully cut off of various makes of common fenders, with their folded over edges removed. These would be inserted into the fender that's being rolled, doubling the thickness of the fender and eliminating flattening the edges when passed through the die. They also serve as an accurate gauge. I hope the readers can visualize this. I sold my roller at Memory Lane last week. My first roller, I bought used many years ago, and before I used it I visited Wes Pinchot, "The Fender Doctor." It was Wes who showed me the trick of doubling up the fender. Wes got the name, "Fender Doctor" from the late Larry Hurd, curator of Schwinn's Chicago museum. After straightening out a badly damaged fender for him. Larry said, "Wes, you really are a "Fender Doctor." The name stuck. Wes is now retired from fender rolling and so am I. As Shawn Freqman said, just mold it in with your hands. Sometimes we forget, it's only a bike. Enjoy the hobby, I have.