putting some 1mm high text on an existing STL is as easy as this in OpenSCAD
import(“MavicMiniCase_Final_Lid.stl”);
translate([-16.5,-97,46])
linear_extrude(1)
text(“GDAC”,size=10,font = “Liberation Mono:style=Bold”);
the result:
alternatively just drop multiple stl files in your slicer and move them to the right places (I use Cura)