A little more progress on the train, this time with a test of the Kommandowagen. The Sketchup model was flattened and printed out, and then glued together to check that it would work on the model railway. I also built a test chassis rig from from plastic I-beam, with brass point bearings and Hornby 14mm metal wheels, spaced at 70mm and 80mm centres so that it could be used to test both the armoured railcars axle spacing (70mm) and the longer spacing on the Pz38t tank carrier wagon (80mm, bearings can be seen at right hand side of pic that the axle can be moved onto) around the 1st and 2nd radius track on the railway. Even on the longest spacing it makes it around the 1st radius curves without derailing, although at speed it might well come off.
The railcar with the card mockups of the loco and tender, and the Sketchup model of them together for comparison.