Reversed it to the buffer to lose wagons, looped round to reverse the locomotive, and then went to the spot where I took a picture.
I had to use a 6000 shunter to take the wagons to the spot, decouple and then arranged the consist for the photo (coupling a NS2200
locomotive to the RET flat wagons do not work, though). Took an hour in order to prepare for a screenshot!
To be fair though, a 6000 shunter could haul a long line of RET flat wagons no problem, despite the slower speed of around 50 km/h