Basic to Iron, and Copper to Iron upgrades have the same recipe. currently it is impossible to skip copper and make a Basic to Iron upgrade. This can be circumvented by crafting an Iron Chest/Barrel directly, but makes it impossible to upgrade a basic to iron without first upgrading it to copper.
Mod version: 0.9.6.720 MC 1.20.1
Basic to Iron, and Copper to Iron upgrades have the same recipe. currently it is impossible to skip copper and make a Basic to Iron upgrade. This can be circumvented by crafting an Iron Chest/Barrel directly, but makes it impossible to upgrade a basic to iron without first upgrading it to copper.
Minor bug, but yeah, there it is.