Guys
While an appendix list of unit bases is basically the only thing I miss from the beautiful double set of JG 300 books by Lorant/Goyat, they very clearly state that the first airfield used by the Stab and I. Gruppe was Bonn-Hangelar. No doubt, one gets full details when reading the books, but unfortunately I didn't think about it when I did, so I have no list to produce...
Cheers
Stig