I was searching for a way to wrap my amazing catan game I found here on thingiverse in a similar great box. So I came up with what you can see in the pictures. This upload is just about the sorting box for the land and water tiles but I will also upload the other parts.
Sorry for the german naming of the stl files, but i was to lazy to rename them.
here is the important part:
There are piece-holders with 12, 21,26 and 36 mm spacing in between. All piece holders are interlockable.
You will need
12 mm for Water and dessert
21 mm for wood, sheep, grain, gold as well as for the brick tiles without housings on top of the hill
26 mm for the larger bricks and the water pieces with the island
36 mm for the iron mountains.
then you will find two special pieces for the largest road and largest knight trophy, that also leave enough space for dices and number plates as well as a front and back cover "Abdeckplatte".
All tiles have to have the magnetic base . Otherwise there is to much gap between the tiles and the holder, so they will shake to much.
In the pictures you can see a version for 6 players with the water extension. (27 water, 4 dessert, 7 resource tiles of each type, 4 gold and the two trophies). For this setup, you will need 3x12mm, 7x 21mm, 1x26mm, 2x36mm and each of the special trophy parts. I placed them in 5 rows, meaining you will need 10 end covers.
Make sure you have enough plastics laying around, as this is not a material saving design, but therefor quite stable and reliable.