Wagons for the logistics network
Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
Could the wagons be made using the default cargo wagon sprites, but colored for the type of chest? Most mods seem to use the original sprites with small changes to make new buildings.
There's no reason why not, but I find recolours to be the epitome of lazy. What I would rather have is new and distinct sprites.