Happy to see this topic re-opened for posting...
There is indeed a lot of factual findings in that intérim report.
One thing I find interresting is that the engines were all the original 1939 models (I understand upgraded / more powerful engines were later fitted in the JU-52) with all about 1000h since last retrofit. I wonder what kind of actual power they could deliver.
Unless I have missed it no mention of passenger recording. Surprising.