Overflow was a custom design, built by bear27, nice smoke acrylic built to specs, couldn't be happier with it.
In operation:
Sump is bear27's old sump, now that he's upgraded, was a bit tough to make the plumbing work... But it all worked out in the end (yeah, it's a tad low, something about overflowing 10g of water will do that) Not sure on the exact volume, believe its around 30-35 gallons.
Andy