Last, but not least, I got myself another camera.

A few years ago I destroyed my Go pro 2 Hero which I liked to use on my
bike, but this unfortunately was to wide for the HO trains.
At the time I got a new Go pro Hero 4, but didn't know about the Session model,
which is square and is exactly the width of a HO wagon.

These where not made for a long time and are only available second hand.
Well I was lucky and got one.