I finally received an Index 01 today and I’m quite happy with it. I did make a mistake in ordering my size and ended up with a ring two sizes too large because I just read the chart wrong.

I was lucky in this case because they freely provide 3d models online. I was able to design and print my own resizing ring and even carved a notch in the model so it indexes (heh) on the square portion.

I’m open to sharing the .Blend if someone knows a good place to easily host it.