4 × Reactor Casing (Basic) + Hopper + 2 × any Iron Ingot + any Chest (#c:chests/wooden) + Piston → Reactor Solid Access Port (Basic)
any Reactor Controller (Basic) (#bigreactors:reactor/casing_user/basic) → 4 × Reactor Casing (Basic)
Textures, models and item names © ZeroNoRyouki and the Extreme Reactors contributors (originally Big Reactors by Erogenous Beef).
Recipes, names and numbers are read from the mod files of Extreme Reactors 1.21.1-2.4.28 for Minecraft 1.21.1 (NeoForge). Not affiliated with the mod authors, Mojang or Microsoft.