3 years ago I was given the opportunity to research the He-111, Ju-52/3m,
and Ju-88 in a museum in Norway and did a few hours video recording on the details of the aircraft, going over items not usually discuses in books on the aircraft.
I was surprised by how advanced these aircraft where for being build late 1939 (52 was built in 1936).
I have started to upload portions of the recordings to youtube.
I will upload more over time, it will take a while
I someone wants to know about something specific can discuss directly with person.
The He-111 nose gunner (called A-stand).
The He-111 ventral (belly) gunner (called C-stand).
Operating the bomb jettison and automatic bomb arm-release mechanism