Many roads lead to Rome, so Ern Hettinger has another suggestion for the design of a ballast load that can be removed.

When enough conversion cars were available for passenger trains, the Deutsche Bahn converted many Donnerbüchsen into railroad service cars. Kiss Modellbahnen offers a maintenance car with kitchen compartment for gauge 1 for epochs IIIb to IV, as they could be found at many medium and large stations.

Along with track details, freight cars are among the least photographed objects on the railroad. I found a few that matched Wunder's hand samples in the archive. Hoppes in use during track renewal.