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this needs .stl files that actually work for this to be worth printing. Your .stl file method you have listed in the comments is junk. List each part as a .stl file not your entire design as one.
Can you share the individual .stl files?
@Lukas_16934 Thank you.
That doesn't really work for me, because you can only split vertically. For example if you split the base, you end up with the feet of the UFO in it. Can you just share the individual parts (one for each of the gcode files)? Or even 3mf files?