Blockus overwrites the vanilla Barrel into a Spruce Barrel that requires spruce wood specifically; but the Crude Storage Unit recipe still requires the same ID, so the result is that a Crude Storage Unit can only be crafted with a spruce barrel. It would be nice if it could use any type of barrel for crafting.

It seems like TR already accommodates for this and I was just trying to use the wrong recipe. Sorry to bother you with unnecessary issues >.<