Made on A1 mini with PLA, Holds 15 roads, 4 cities, 5 settlements, 9 cross roads, 1 legoish piece for a counter for longest road which will be in the top cover.
Held together with 6mm x 5mm magnets, magnet holes need little cleaning top lip only, place magnet and tap tap tight fit ( I bought cheep magnets which worked great in each corner, used strong magnets and only needed two in oposite corners ).
The Catan print I used was from Dakanzla design so at all intersections there have cross roads, I glued cross roads to the bottom of my cities and settlements and they stay on board well and in the slot in the case, that's why there is circles in the case where the pieces go. The road slots will hold normal roads, Chinese road, Aztec roads and Rome aqueducts.

Building cost card is from Zeus370 in Makerworld and I had to trim boarder slightly but you can resize, hand painted
Case design idea came from Dalby05 in Makerworld his version is for smaller cards and I could not get print to stick to bed. I also wanted the case to hold different player pieces and have a way to keep track of roads that were built.

Bambu mini A1 , Overture PLA, bed temp 70, nozzle 220, added brim because added protection it wouldn't lift.
My first big project

don't know why pics are not showing up
I know there are too many files I will update asap

This object was made in Tinkercad. Edit it online https://www.tinkercad.com/things/kRNU0z03Y7r