A quick update.
Received the missing LEDs for the position lights and indicators needed for the cab. That was fast work from ScaleART as well the postal services!
Guess the folks at ScaleART must know I'm no good at soldering ... the wires are nicely soldered on and wrapped in heat shrink tube.
On the question Doggy asked about the casting material, found the answer on the ScaleART website:
https://scaleart-shop.de/en/Help/?si...def5a1e0b02320