While it's cute to Print-In-Place a one plate working model, it's not easy. After personally trying to print this twice and losing 5 hours of print time each, I finally got it right on the third try and another 5 hours.
I've simply taken the medium bracelet size and made four stl files.
This should help those that cannot handle the extreme tolerances of the original.
2-3 walls, hollow or completely solid your preference. Gently bend the smallest into the next largest and enjoy.