I was impressed by https://www.printables.com/pl/model/73388-martins-puzzle-rocket.
I decided to create my own puzzle just for Easter.
Good result when printed at infill 10% and layer 0.30mm.
I recommend printing the core (level 0) at infill at least 40%.
Better result when the top (level 9) is printer with layer at least 0.20mm
No supports.
The author marked this model as their own original creation.