I have already inserted pauses in the 3mf file to perform a filament change if no ams should be available.

I myself have printed it with an AMS. When the first color (black) was ready I simply replaced it with white filament. That means you have to select the color black again in the slicer at the last change to white.

first layer 0,16mm

layer height 0,08mm

Swap Instructions:
Start with Black
At layer #8 (0.72mm) swap to Gray
At layer #11 (0.96mm) swap to Dark Red
At layer #14 (1.2mm) swap to Dark Brown
At layer #18 (1.52mm) swap to White for the rest.