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The piggy bank is relatively easy to print and assemble, I strongly recommend using glue to fix the components.
The pieces are all already oriented correctly. Use tree supports only for the dome and external structure. To avoid using brims which can compromise the coupling of the components, I recommend good leveling of the surface and a speed of the first layer of 8mm/s. The default settings are fine and do not require any special precautions! To attach the dome arms to the roof, use a piece of 1.75mm filament,. Remember to fix the arms to the roof first and then to the dome and then fix them with glue. If the arms do not fit into the dome, simply file the joints slightly.