I opted to go with an external overflow to maximize usable space within the tank. I missed taking some pictures while building the external overflow. Never fear, there are several good threads out that walk through the process step by step.
Here's how I drilled the holes. I'm installing two drains in case one gets clogged. Thanks to my wife for the play dough (kindergarten teacher).
Here I'm dry fitting the box.
Here's the overflow complete with the tank on the stand. You can see now why I needed to create the angled section on the right. It will allow me to snake plumbing up that side of the tank for a return.
I was able to get all the plumbing parts I needed at Lowes. Gone are the days of paying for overpriced bulkheads.
