"Overflow is standard external with three holes. Primary siphon with trickle down the emergency and third is my return which I still need to fit with some loc-line. Black vinyl on back of tank and the overflow teeth are CNC in a black plexi insert that can be removed "
The black vinyl is on the outside of the back glass and the black plexi is on the inside of the overflow as a removable piece? The reason I ask is they made my back plastic panel permanent on the inside of the tank. It covers the entire back glass and acts as the strainer if you will to the externally mounted overflow. What caught my eye was the visible silicone joints on your tank. I didn't understand how it was made I guess.
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