Just got to take the pocket 6K to a train museum. The old trains had a lot of rust and character. This was shot in 6K (mainly 30p slight slow motion):

6K Verions (youtube turned into 5K): https://youtu.be/atnQGyLo7y4

8K Version (with a more aggressive grade): https://youtu.be/GYLXbmOR1rQ