It's hard to tell what temperature the generator will bring you UDS up to. In a small cabinet like the Bradley, I have hit around 120°F, sometimes 140°F on a hot sunny day.
I have measured the temperature generated at the heating pad with an infrared thermometer, and at the surface the pad get up to 525°F - 555°F. You may need to make some sort of hood to prevent drippings from falling onto the heating pad and rail guide.