This is a cool idea, just what I was looking for. Can you also make it so trains cannot be manually placed, and are not mineable? They shouldn't be able to enter your inventory :p ... this can be an option, maybe, since most people probably wouldn't like it. It makes sense to me that a train can't be just picked up off the tracks. Maybe then also add a building to deconstruct a train (though I wouldn't use it, personally, because I rarely reduce the amount of trains on a map).

Also, please add compatibility with Factorio Extended Plus fast trains: https://mods.factorio.com/mod/FactorioExtended-Plus-Transport

I am thinking of adding a deconstruction building in the future. Until then I won't make them unmineable.

If you want them to be unmineable, you can use this mod where I have lots of experience with, it's great fun.

Kind regards
lovely_santa

EDIT: new version (0.1.6) is compatible with the factorio extended trains for sure (I've tested it)

Very nice, thank you for the response :D

Edit: I tried with factorio extended plus; the train parts worked properly, but I'm unable to choose the mk2 or mk3 trains in the trainbuilder building. Only the vanilla trains show up. https://imgur.com/a/YM8SeQ1

My bad... doing half mod compatibility, i'll get a new release up today!

Tested again, works great! Thanks for the cool mod :)

Have fun playing!