Board game insert Sprawlopolis / Expansiopolis

Board game insert Sprawlopolis / Expansiopolis

The design premises are simple:

The wallet isn't enough rigid to protect the cards so I prefer a sturdy solution.
Besides, when cards are sleeved there is not room in the wallet for them, so I designed a new deck box to keep core game and expansions (beaches, construction zones, point of interest, wrecktar/fairfax) together.
There are two diferent spaces to have the game organized, for identifying purposes two holes of different sizes are put, the big hole for the main game, the small hole for the expansion game.
Also holes helps to extract the cards more easily.

Any improvement and/or coment is welcome!