This is the first print I've designed. So, I'm welcome to any constructive feedback.
These inserts should be able to hold and organize Catan base, Cities & Knights, and Seafarers expansions, each with the 5/6 extension (I don't have seafarers yet, but it should fit) On the plus side, you don't need the expansions or extensions for this to work...print the same pieces, but instead of havnig the largest army/road cards loose, use them as lids on the 5/6 player boxes, and store whatever you want/need to in them.
The player boxes let you slide the building costs card in as a lid, to store all the player pieces, each hex insert holds 13 tiles (for 78 total).
The two card cases, have a total of 6 spots to store cards, and when opened and split in half, stand on end providing 12 spots to dispense cards from. I put two resources (or types of cards) in each spot when packaging, and you could slip a spacer between them so they're easier to split for setup.
The idea behind the design was to use as little filament as possible, so lots of holes, and walls were removed where possible.
There should be enough little containers to sort things out how you want to with some of the tokens, dice, and other miscellaneous pieces. I may design some trays to fill in the bits of space that are left, once I get the expansions and see if this needs any adjustments.
I printed it with 20% infill. You shouldn't need supports, with possibly a need on the card cases, as the arch might be too sharp (in hindsight I should have made the cutout a hex instead)
6 - Catan Box - Hex Insert
2 - Catan Box - Hex Half Point
1 - Catan Box - Hex Half
1 - Catan Box - Tokens
1 - Catan Box - Corner
6 - Catan Box - Player Tray
2 - Catan Box - Card Case
1 - Catan Box - Book Tray