Organizer for the Marvel Legendary card game designed for upright storage in the retail game box. For estimating capacity, the pictures include all the cards from both the base game and the Dark City expansion in "normal" (not premium, not penny) Mayday sleeves, although I imagine that the design will accommodate just about any sleeves.
Print four of CardHolder and as many of CardSeparator as you like. Brace is more form than function and hence optional; I was hoping that Brace would hold the CardHolders in place more firmly, but the box sides are simply too flexible.
Complete set of *.stl files may be found at: https://www.cgtrader.com/3d-print-models/games-toys/board-games/marvel-legendary-organizer