Commander Deckbox (fits oversized card)
I wanted a commander deckbox that was basically the same design as the packaging, but can fit 100 sleeved cards and the oversized cards. This is what I ended up with.
It's two parts and friction fit. It fits really well, it'll be tight at first but even after it's broken in, the lid won't even fall off if you shake it upside down.
You should be able to scale the z-axis up if you need to fit more cards. Keep the lid the same scale and it should still fit.
I'd say make it about 30% taller for double sleeved cards.