I modified LinkDesign's amazing RotaRings model because I had issues with the original in terms of printing and stability, mainly due to the Print-in-Place axles.
While I was at it, I also made the outer three rings slightly wider, which further improves the stability and handling of the fidget.

Printing information

The STL files are correctly aligned.

Layer height: 0.2mm
Perimeter: 2
Infill: 10%
Support: none

You should monitor the first layer's print, as many details are being printed here. Good adhesion is essential for a successful print outcome.
A tip: I always use 3DLAC spray adhesive. With it, challenging first layers are no longer a problem. Just spray a little on the print bed. One spray usually lasts for five to ten prints in my experience.

As you can see in the pictures, you have various options to add color to the fidget.
Here are the color changes I chose for my three versions as a reference:

white and black

• start with white
• change to black at layer #6 (1.20mm)
• change to white at layer #11 (2.20mm)
• change to black at layer #36 (7.20mm)
• change to white at layer #41 (8.20mm)
• change to black at layer #66 (13.20mm)
• change to white at layer #71 (14.20mm)

gold and black

• start with gold
• change to black at layer #16 (3.20mm)
• change to gold at layer #31 (6.20mm)
• change to black at layer #46 (9.20mm)
• change to gold at layer #61 (12.20mm)

black and blue/purple

• start with black
• change to blue/purple at layer #21 (4.20mm)
• change to black at layer #52 (10.40mm)

You also have the option to print the three outer rings separately. Then you can customize the color of each one individually.

Assembly Instructions

Assembling it is a breeze. You have two shorter and two longer dowels, which should be glued into the designated recesses with a very small amount of super glue and function as rotating axles between the outer rings.
Start with the two shorter dowels; these go on the inside.
Then, place the two longer ones on the outside. 

I am looking forward to your Makes! :-)

If you like this design, feel free to check out my others here.