When I was at Newcastle there was a model shop in town I used to visit fairly regularly. It had some stuff competitively priced. I picked up an N gauge German Pacific for a song and set about turning it into a South African NG something or other.
In reality the chassis isn’t really suitable but for the purpose of learning model making it was an interesting exercise.
The tender is as I imagined NG15 134 of the WHR’s tender would look like,
The boiler is a bit of brass tube cut with a saw at one end and opened out to make a firebox.
The cylinders were fabricated around the existing N gauge ones.
And I even managed to make a dummy outside frame for the trailing truck.