Jigs are overpowered and I don't think this is an unpopular opinion. Jig Cost: 3000 Metal produced: 36 /s Energy produced: 9000 /s Metal storage: 10,000 Energy storage: 50,000 Advanced Metal Extractor Cost: 1700 Metal produced: 19 /s Already we can see that on the basis of metal production alone the Jig is more cost effective than advanced metal extractor. Advanced Energy Plant Cost: 2000 Energy produced: 3750 /s On top of that we have it being far more efficient than the advanced energy plant. To make its value even better it acts as half a metal storage and half an energy storage. The biggest insult to injury though is the fact they explode. Intended to limit construction of jigs, as they can chain react, a simple click and drag prevents that from ever happening. Any semi-competent player will never build jigs close enough to chain react. The fact jigs explode then works in the defender's favor, because attackers lose their avengers in raiding, or have to dedicate expensive and slow artemis to raiding, this also requires a lot of micro. Conclusion If an attentive player gets a strong foothold on gas it is impossible to win it back. the eco jigs provide on top of the difficulty of raiding them means gas is not only the most efficient eco, but the easiest to defend. Edit: N30n's equilibrium mod changes jigs in a somewhat satisfactory way. Any discussion of potential balance fixes could use this as an example.