Change the rules of the game. No belts. No advanced logistics. All rails. All the time.
Mods introducing new content into the game.
Trains are great, but what if they could do even more?
Missed a comma after "rail-signals" in the tech list.
Factorio gives a Notice upon trying to start a new game, and the error pointed me there.
... That's weird. I wonder how I missed that. Thanks! Uploading new version shortly.
(Figured out what happened. I 'cleaned up' the code a little as I was finalizing the version I uploaded to github initially. And I'd been testing with the version prior to that cleanup.)