When I first built these cement wagons about 3 years ago I made one of the worst mistakes you probably can when modelling and rushed them, resulting in a lot of wobbling and sometimes derailing when running. Obviously the badly built chassis' were behind the running issues so about two months back I decided to start on a new batch and sort the problem once and for all. While I was working away on the building the new chassis' I took the chance to tidy up parts of the weathering and paintwork on the bodies which was another thing I hadn't been happy with, and I've also added some extra detail to both ends of each wagon by using plasticard and SSM break wheels and wire.
None of this is by any means 100% accurate but I think it represents the framework and hand wheels from the prototype quite well and certainly adds to the appearance of the model.
The chassis' still need some weathering applied to blend top with bottom but that's a job for another day, main thing is their now running smoothly.