I have the same overflow on my 32gal office system.
I don't have any photos of the plumbing, but I'll try to explain what I ended up doing.
I set up the overflow using the Bean Animal system and it runs completely silent.
To line up the three drain lines with my sump, I needed to have the emergency drain on one end; which caused the full siphon to become the center drain and the open channel to be the opposite end.
Since it is a bit cramped inside the narrow exterior overflow box, the emergency drain is just the extension of the pvc pipe coming up through the uniseal. The full siphon is capped with a bulkhead overflow strainer. The open channel has a pvc Tee fitting positioned sideways so there is a opening at the top and water trickles through the side opening; which is placed above the overflow strainer. It's difficult to try and use any 90° elbows, so the tee fitting was used instead. Once the gate valve on the full siphon line was dialed in, the overflow is dead silent!
I debated on switching out the unseals for bulkheads, but after a few conversations with various hobbyists and professionals that use the uniseals, I decided to stay with the unseals. It simplified the plumbing options inside the box by already having the pvc pipe available for the fittings.
Other than the tight box on the back, I love this overflow kit. The removable interior overflow box is great for keeping the entire box clean.
If I every upgrade my larger system, one of the first upgrades will be using another of the ModularMarine Overflow kits.
