This design is compact, tileable, and best ratio. https://kirkmcdonald.github.io/calc.html#tab=graph&data=0-17-1&rate=s&min=2&items=speed-module-3:f:2,effectivity-module-3:f:2,productivity-module-3:f:2
Originally shared on the public FactorioPrints / Factorio School archive (factorioprints.com · factorio.school). Authorship preserved from the public catalog.
This design is compact, tileable, and best ratio. https://kirkmcdonald.github.io/calc.html#tab=graph&data=0-17-1&rate=s&min=2&items=speed-module-3:f:2,effectivity-module-3:f:2,productivity-module-3:f:2