I discovered it's horribly hard to mix concrete with water to make paste, without leftover concrete. So I chalange you to make a mixer that takes concrete, mixes it with water, makes paste and pours it into a mold, where it is slightly heated, so it hardens into brick.
@user25(View Post) I saw your ones evacuate paste though portal out, so I placed one and alot of raw concrete poured through instead of paste. So there is alot of unused concrete.