Test Print 

Before printing the whole ring, I'd recommend making the test part to check if the tolerances are fine. You should be able to move the joints without using much force to break them free. If this is not the case, you could either reprint with less flow or print the version with higher tolerances.

Bed Adhesion

When it comes to printing the actual ring, make sure you have good bed adhesion because there are a lot of small separate parts on the first layer. You might need to considerably slow down the first layer. 

Elephants Foot 

Be careful with tight bed leveling though since none of the parts on the first layer should touch an other part. 

No Supports

This print does not require any supports if printed in the orientation uploaded (plain side up).