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Mini surge factory

Not the most efficient use for a full belt in the case of the copper and silicon, but it gets the job done without having to double the number of smelters. I don't know why you have overflow gates instead of just regular titanium belts though. This design appears to prioritize thinness at 8 units wide for two smelters, which makes sense for a core attachment. I might use a slgihtly modified version of this sometime.