A brilliant idea to have working models dealing with our industrial heritage. But the working parts need to be more robust.And the parts that secure the working parts need much improved anchoring -to make it stronger I cut pieces from the sprue and stuck them on which should not be necessary.
This model is ideal to show children how early machinery worked but children are a bit heavy handed so the model should recognise this. Also a simple explanation of how the engine worked would be useful.
A good idea but not very well executed.