Need to setup 54gallon corner tank for sump

[jzz30tt]

I have an Oceanic 54G curved front corner tank and i'm trying to figure out the best way to make this puppy reef ready.

The bottom sheet of glass is tempered so going through that is off the list. The other thought that i had is running an overflow exiting through one of the two flat glass panels near the rear of the tank. The question being does anyone have any good ideas for this without losing too much of the volume to an overly large overflow?

Also i'm assuming running a durso via a single hole and bulkhead would be sufficient?

Discussion or any ideas are most welcome.