I can finally add mine to the list!
This was a long time coming and took a ton of planning.
I tiled the floor (replacing carpet) I had the room plumbed for a sink and I had two GFCI outlets installed. I had to wait 2 months for the tanks and I built the stand that they're sitting on. The only change coming is that I'll be adding a hose inlet right before the pump so that it can be used to take water out of my tank on water changes as well.
I didn't plumb "emergency" drain lines to the the left and right of each tank because I can loosen that middle T to point down and drain if need be.
I do have a question for everyone that has one of these though... You aren't really supposed to keep old salt water around, so what do you do with the last 2.5gal of so that can't be pumped out of the bulkhead at the bottom of the SW mixing station?