Machine Parts Factory

The Machine Parts Factory is the 4th 'Production' building you unlock

This building produces machine parts from stone. Normally, it requires 3 stone to make 1 machine part, but Scrap Metal Recycling can reduce the number of stone used to 2.

Building modes include Enable Factory (work normally), Turbo Boost (the factory works faster but costs 2 more stone for every machine part), and Disable Factory (factory does not produce machine parts)