The bulk rail loader mod is one of my favorite mods hands down.

My ignorance but this just assumes everyone uses a 1 engine train? is there a way to set default to 2 engines, also max of 4 cargo wagons per station?

Also doesn't work with loaders, that I can test right now.

*Mod - Loaders Modernized.

I actually just fixed loaders a few seconds ago, uploading the update soon. I'm working on some UI settings so you can set if you have double ended train engines, or only engines in the front, or only engines in the back, and so on. a temporary solution is that I made silos hand minable, so you can pick up the ones you don't need if an engine would be there

edit: I have added some basic buttons that change the number of skipped wagons at the front of the train, to support 0 or 2 engine setups

That's great, however if you can only add a maximum of 4 bulk loaders and hand mind the front one, that'll leave the last cargo wagon unfilled correct?