Quality increases the inventory size of cargo wagon and the capacity of fluid wagon. This mod can make trains more efficient.
Small changes concerning balance, gameplay, or graphics.
Trains are great, but what if they could do even more?
Placing down ghost of quality wagon of a copied one with disabled inventory slots does not keep the disabled slots. You are not copying everything when wagon gets placed down.
Same applies for cargo wagon grid (https://mods.factorio.com/mod/tbx-equipment-grid-wagons?from=search)
+1