Alternate Bottom Surfaces - Overlay and Stripping Components

Has anyone successfully created a bottom surface from a stripping component? I would like to create a "milled surface" using the bottom of the stripping component representing the milling depth. Entering a value into the Alternate Bottom Surface in the template, running the template and selecting create alternate surfaces doesn't seem to do anything. I recall this was an issue in InRoads and I never figured out a solution.