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double-o rule
(lemmy.blahaj.zone)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
And you need to use the right copper ore for that mod's recipes, the copper from the other mod wont work.
Ore dictionary go brrrrr
But honestly, vanilla Minecraft adding copper was the best thing for modded, finally eliminating this specific problem once and for all.