Hopefully this is the correct sub-forum for this topic.
I'm currently in the process of re-formatting my personal database for aircraft sightings since July 2004 and am considering the most comprehensive database or publication to verify the various details required (frame sub-type, manufacturer serial number, owner/lessor & operator). I have in the past used jp airline-fleets though my reasons for not continuing are explained well in this thread:-
http://www.flightglobal.com/airspace/fo ... aspx#31315
My predominant interest is in commercial and government operators, and use On Dutch Wings for the military items of interest (specifically Wing/Squadron, etc).
I would be interested to hear how other members gather their data, many thanks.