I don't have much experience with vintage DE's, but the few that I have seen appear to stop around the 5-level of my Futur. The modern adjustable DE's seem to have a wider range essentially all the way up to pure blade. I typically set my Futur between 2-3. This is plenty aggressive for my taste. I believe that the Progress is similarly calibrated. However, it is larger, thicker, and heavier than the Futur so you would need to use a lighter touch.