Anyone run a sump for larger freshwater aquarium?

I have a 185 and I drilled two holes in the back using an eBay diamond hole bit/saw with a very narrow internal overflow box running near full length of the back draining through the holes into a external box with three holes drilled in the bottom for a bean animal overflow into the sump. I have the return plumbed to an external pump feeding a manifold that runs around the rear and both sides of the Hood to feed back to the display. An internal/submersible pump would also work

Both the internal overflow box and the external overflow box have three sides on a bottom all made of glass and are siliconed to the rear wall, inside and out, respectively

It is impossible to consistently match your overflow to your returns, and the siphon types will eventually fail. My setup is foolproof