@HumberLoop, I’m a third-party developer. I’ve been working on the project for the last 4 years, in between battling serious illness.
@GeoffersH I have some plans to do some steam too, probably mostly anything by James Stanier – arguably the best locomotive designer ever. I have a fair amount of diesel content ready to go virtually as well as rolling stock. I may even be tempted to do the odd bus and truck 😛