Absolutely loved playing through this mission, especially all the detail in the readables.
I found 8 of the secrets on my playthrough and came to this thread to get hints for the others.
One remaining thing I can't locate:
Just finished this today after spending many hours exploring everything. A very impressive mission with loads of little details to appreciate. Going to move on to number 2 in the series now.
Many thanks for all your hard work @Bienie