Adds logistic related things.
Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
could you make each repair pack require the previous tier, so that it would be like an upgrade system?
the repair pack is a consumable, there's really no need to have them upgradable as all tiers are useful. if you did make them upgradable, you're basically just throwing away the old one and replacing it with a new one.
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