Red belts in the middle are needed only for maximum performance with ~115 labs (800 science pack per minute with red vs 600 with yellow).
Links:
Originally shared on the public FactorioPrints / Factorio School archive (factorioprints.com · factorio.school). Authorship preserved from the public catalog.
Red belts in the middle are needed only for maximum performance with ~115 labs (800 science pack per minute with red vs 600 with yellow).
Links: