Fuge built in to Display tank

So in the near future I'll be setting up a 120g reef tank (upgrading from my 55g tank). I want a fuge for chaeto and pods, maybe some other macros down the line, and from the research I've done, I'd like to have it drain into my display to keep the highest amount of pods alive, plus, I like my sump pristine, and they tend to get all over the equipment, even when they're separated.

Anyway, I don't want to set up a tank on top of the 120g for a few reasons, it would make lighting complicated, and being a 120g and weighing upwards of 1500lbs, I don't want to add any weight that I don't need to.

What I'm leaning towards now is building a fuge into the back of my display.
It would work something like this:
Fuge would be plexiglass, painted black or dark blue, measurements would be 48"w x 6-8"l x 12"h. Only 12" deep so I can still reach into it and move stuff around if I need to. The corners would be sectioned off for the overflow, about 3"x3" with cut slots in the top to drain water from the Display, then the wall facing the display would be a little lower and the return would pump into the fuge, overflowing into the display.
I've never seen anything like this, but I think it could work, plus I'd have the added benefit of not needing any additional lights because they would be exposed to the Kessils used for the display.

So, thoughts?