Hi Stijn,
A little more on the Me 323 loss. It was almost certainly the victim of American fighters, with the 48th FS/14th FG claiming the destruction of a "six-engine aircraft" between Marettimo and Fatignano Islands on a mission between 10:00 and 13:50. Soon after, at 14:20, a pilot of the 49th FS/14th FG claimed a "six engine seaplane" damaged, and also claimed the probable destruction of a Ju 52.
PS - I'll be sending you an email in the very near future.
Cheers,
Andrew A.
Air War Publications -
www.facebook.com/airwarpublications