This version doesn't need a separate printed "yellow base" it combines the 3 colors in one object. the colors come at different layers.

Printing order Layer 1 - 2 white Layer 3 - 4 gold Layer 5 - 6 black

for slicing i did use cura. cura might give you a error message about the object not beeing watertight. ignore that. it did print just fine.

in cura i scaled it to 1.44mm Z for 6 Layers for the Filament change i used the "Pause at height" post processing scripts at Layer 2 and 4

it's a remix of https://www.thingiverse.com/thing:5207779 which says it's a remix of https://www.thingiverse.com/thing:4396459