I think it would be good if the new Mk1 coaches for spirit of steam would let off a little bit of steam randomly in the journey. Looking at many old BR archived videos it can clearly be seen that the Mk1’s let off some steam which I believe is caused by heat in the brake system. This would be quite a cool feature to see not only running but also rising between the platforms!
Already suggested by me - see below! https://forums.dovetailgames.com/threads/steam-heat-effects.51268/
