Originally shared on the public FactorioPrints / Factorio School archive (factorioprints.com · factorio.school). Authorship preserved from the public catalog.
It's safe to downgrade everything legendary. Green and red circuits are better to have the set modules or better to have the full factory utilization. Rare inserters are needed only for a legendary setup. You can add rare+ productivity modules to iron plates and cables if your iron and copper are not free.
