OK, now I’m confused by a photo vs. a drawing in the manual.
The photo of the QU-sb in a rack looks like the mixer is flush with the rack AT THE BOTTOM, so that the top of the mixer is slanted inward creating greater room for connected cables with the rack lid on.
The drawing looks like the the mixer is flush with the rack at the TOP of the rack, so that the bottom of the mixer is slanted outward and extends into the lid portion of the rack, creating less room for connected cables with the rack lid on.
Which is it?