Suddenly realized I have no idea where these Axis aircraft are coming from.  Had to pull out the Balkan Front maps and Wavell’s War OB to get location of Greek cities and airfields.  Not much out there.  Decided the Germans would have constructed some airfields in Greece in preparation for the attack.  Also decided that Bulgarian airfields were not to be used.

Caculated distance for off-map airfields/cities.  These were Kavalla, Thesalonike and Athens.  The former two, plust the three, three-capacity temporary airfields give the Axis some ability to support their initial attacks.