Btw I had a short look at the document provided by Segment at the start of the thread and it seems to be the case that there were only 3 types of rounds for the "old" MG FF cannon
Sprenggranatpatrone L-Spur-FF (i.e. High explosive round Tracer FF)
and the
Sprenggranatpatrone L-Spur-Üb.-FF...
The MG FF/M was modified to fire the much lighter 92g "Minengeschoss" round that had about 4-5 times as much HE content as the ordinary high explosive rounds up to that point (18g vs 4g). This however required a modification of the recoil mechanism which in turned meant that the older 134g...
Thats not quite true
Apart from a different radio set, 13mm MG131 machine guns instead of the 7,92mm MG17s which were the reason for the cowling buldges, a non-retractable tailwheel, bigger wheels and thus the necessity for the kidney shaped wing bulges the G2 and G6 were identical.
Weight...