Well I am in the process of setting up a 40 gallon breeder. I am close to the point where I will be in need of an overflow. I have been really looking at the Fiji Cube 800 gph overflow and I will be drilling the tank. I keep coming back to the Fiji Cube. Any input or experience with this overflow. They are also the only one who ever got back to my emails.TYIA. One other thing, is it possible to install where I won’t see waterline if I drill from inside of tank?