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Removing it from JEI doesn't remove the recipe. People that search the use of the Diamond Chisel will still see that the iChisel exist.
By removing the recipe itself there will be no trace of the iChisel so users can't accidentally make it and crash their game.
Can't Darkosto temporarily remove the recipe. That way it can't even be crafted and can't crash anyone.
People that know of the iChisel wil keep trying to craft it as the recipe still shows as a use of the Diamond Chisel.
