[CharlesM]

Thanks. I did some checking. Photos of the Saukopf-mounted MG are easy enough to come by; those used in the composite mantlet less so; the one posted on the AAMG discussion is one of the few I've seen. In the Opsrey on the later StuG III and IV, Tom Jentz states that the co-ax only began to be fitted into the Saukopfblende in the Spring of 1944.