I hate that this game has no Inlay. With the plastic bags, the Box is quite packed if not organized. I found none online so I made this.
Made for German version (Cities - Große Städte, Große Pläne) but I doubt other versions are different.

To get the honycomb base (optional!) set the slicer to "No Top/Bottom-Layer" for the first 1mm.

Printbed size: 220x220 (Thankfully, the box is exatly the size of my K1)