Placing the reactors in a diamond shape instead of a square adds 2 more adjacency bonuses, increasing the total efficiency to 3.5 (14 reactors for the price of 4)
There is a coolant launch system
Originally shared on the public FactorioPrints / Factorio School archive (factorioprints.com · factorio.school). Authorship preserved from the public catalog.
Placing the reactors in a diamond shape instead of a square adds 2 more adjacency bonuses, increasing the total efficiency to 3.5 (14 reactors for the price of 4)
There is a coolant launch system