had to get em all for the Random Train Trailer mod

I have read it @Acc3ss Violation so that's not a problem.

That works, but you'd have to add a config to make the short train use those trailers yourself. Check the discussion page of the mod for some info on how to do this.

Thank you for the clarification @Acc3ss Violation so in that case I could for example use AVO to sub to a long train, disable that train froms pawning with AVO, and then with this mod my shorter cargo train would randomise both trailers from both trains? And YES 'addition' would be referring to would be awesome. If you accept dlcs as support feel free to add me.

The amount of trains in the game is irrelevant. The default config (for the trains in this collection) only has each train use its own trailers. What order they appear in and how many of each type of trailer are used is randomized.

The config allows you to create a list of trailers to randomly pick from for each train asset. Where these trailers come from (be it the asset itself or another asset) doesn't matter.
But there is no collection like system to, say, create a list of container wagons and a list of closed goods wagons and upon spawning randomly select one of these lists and then pick random trailers from that list only.
Although that could be a nice addition.

Please clarify: This mod only works if you are operating more than one train in your game and therefore randomises those trailers? Or is it possible to include trailers in a config file without the train itself in order for a single train you wish to use in game to randomise a collection of trailers?