In this case, the design is des...igned so that when turning from the appearance of a planet with rings like Saturn.
3d model print parameters
You have to print two pieces but the second can be made symmetrical to the first, so when they are attached, the 3 arms will coincide.
You can also... print the two identical pieces (without making the symmetry), but in this case the arms will not coincide and a triangle will appear inscribed to the outer ring and circumscribed to the outer ring.
Print the parts with rigid filament (example PLA) without supports
Also print a couple of hoops like those published in:
You will also need 100 cm of 2 mm string, which will be inserted through one of the holes in the disc, the rings are passed (one on each side), finally it is passed through the other hole, the ends of the string will be knotted so that it cannot come off and a knot is made near the hoops so that the rope converges at one point and produces more torque.
The puck should be in the center of the string.
The hoops prevent the fingers that hold it from squeezing when the string is wound.