design they have is just extra pipe and reverse flow connectors for the sump. Also they made multiple returns into the main tank, but I only made one return. Since I'm not using a sump my design only needs pipe to the main tank.
It is working beautifully. The cup is already full of a tea like skimmate.
Also notice in the design picture you posted that the venturi is before the valve. It must be after the valve or you'll shoot water out the air line. A major flaw.
I was careful to make my pipe discreet and not something that would be an eye sore.