I built a model railway for taking around to exhibitions several years ago and decided on Belgian, as I was visiting the country to chase trains on a regular basis at the time! I scratchbuilt all the catenary for a main line, and also had a non-electrified section to industries, operated by diesels.
It was the best layout I ever built and was highly enjoyable to operate. Unfortunately it had to go as I had nowhere to store it between exhibitions.
But I do still have some photos of the layout.