Upgrades

[drdozer]

A large and error-prone and tedious part of the game is upgrading existing builds. For example, upgrading a yellow and stone furnace smelting array to a red and steel one. Or adding modules as you go from tier 2 to tier 3 assembly machines.

There are mods to help with this but they tend to be a bit cheaty. They also don't give a progression with construction bots.

My idea is to do this all with blueprints and the existing fast replace rules. Essentially, if you stamp a blueprint over structures and the blueprint has fast replace items matching what you are stamping over, it marks those items for upgrade. Perhaps mark with a blue cross. The q pipette tool would pick the upgrade item and construction bots would replace one for the other.