The Foundry on Nauvis. Overpowered? Factorio Guide / Tutorial

The foundry will heavily boost production on Nauvis. With just small amounts of calcite you can quadruple the productivity of your base and replace traditional smelting blocks with the foundry's liquid metal smelting. Is it overpowered?

The Foundry on Nauvis. Overpowered? Factorio Guide / Tutorial (YouTube)