I use the same setting, every shave, every blade, every pass. In fact the Super Adjustable's dial has never been moved since setting it @3. The adjustability of the razor is pretty meaningless to me.
3 is about the same level as a typical Superspeed, so the Super Adjustable @3 is basically just a longer handled Superspeed.
You see, most blokes will be shaving at 9. Youre on 9, all the way up, all the way up...Where can you go from there? Nowhere. What I do, is if I need that extra push over the cliff...Eleven. Two sharper.