Heating the hardboard for the curve
Take your time, wear gloves and use plenty of adhesive! Here is how I do it: Heat the whole piece of hardboard from top to bottom about an inch behind your last screw, and about 3 inches in front of it. If you are turning the wheel against the backstop at the same time, you can feel the hardboard start to "give" a little bit as you turn. WORK SLOWLY! Expect the first layer to take about an hour to an hour and a half. You want to heat the hardboard up till it is just short of scorching. This takes practice to learn.
Heat screw and glue. Take your time!