Thought I'd jump in here and add my 1 1/2 cents worth. I've owned a bunch of Dual tables (not this model, though.) Most of them don't have particularly accurate calibrations on the tonearm adjustments. Getting a separate stylus gauge like the Shure is a very good idea. If you don't have a record with a blank section to test for anti-skate accuracy, set the scale for anti-skate at about 1/2 of the recommended value. Better too little than too much.
Dave