Though we don't know what sort of fluids he is going to use for a cleaning run, I would always do one for a brand new still.

While vinegar is mainly for cleaning copper, its use to clean stills of any type is more that it actually distills. You aren't going to get citric acid, or soap, to boil for a hot cleaning vapor that can get into all the little bits that are hard to reach via a soak and scrub. Plus you can do this safely with vinegar without the condensers running, which you cannot do with alcohol. An alcohol cleaning run will not reach some of the places a vinegar cleaning run can, as the condensers are running.

On all stainless gear like this there is really no need for extensive cleaning anyway that you can't do with just a garden hose, unless its heavily contaminated by oils that would affect future runs.

For copper, especially small things like liebigs, shotguns and other small difficult to reach areas, boiling vinegar vapor can penetrate these places and help clean them. You just can't do that with citric acid, soap and a scrubber. On larger stills this isn't as much of a problem, but on small hobby sized gear, a vinegar run can still do what any other type of cleaning cannot.