Kingdom Builder - Insert / Landscape holder

To prevent the landscapes/sections from sliding around in the box, I built a minimalist holder (14g filament).
This needs to be printed twice and placed in opposite corners. This is enough to prevent the landscapes from sliding around.
The holders have a small edge/brim to prevent them from flying around when the landscapes are removed.

You can scale the height to:
- **22mm** (20mm+brim): Default as this is the height that exaclty fits in the box without lifting the lid
- **18mm** (16.2+brim): The height for 8 sections/landscapes (only base game)
- **26.4mm** (24mm+brim): The height for 12 sections/landscapes (base game + Nomads expansion). This will lift the lid a tiny bit.


There are three files:
* **KIngdomBuilder.stl**: Plain small holder. Print it upside down!
* **KingdomBuilder.3mf**: Two of the small holders, placed upside down and without shell layers at the underside.
* **KingdomBuilder_large.stl**: The larger model fills the elevations completely. It needs 2x90g filament an