The engine is now just about halfway done! This is now a good opportunity to look (in colors!) at the engine as it stands:
That’s what the real CK Holliday looked like at one time in 1955!
Not everything can be seen in the above pictures because many components and features are hidden inside the model. For example, below pictures are cutaway from the boiler showing the flues and steam pipes, and cutaway from the right cylinder showing the appropriate steam and exhaust cavities, and the valve slide (unfortunately I didn’t render them).