Towards the cab end of the engine there is a steam puff, so the cloud puff Swede saw must be a stack puff.
Swede wrote:
Cool, I realy like the one of the engine, I don't know if you framed it or not but the white cloud above the engine almost makes it look like the boiler is fired up, and she's ready for work.
Job well done, Thanks for sharing!!!
Swede