Five Crowns Round Counter

I made this for family game night. We generally play 5 crowns and we find that having a sign that shows what round we are on is the easiest way for everyone to know. We were using a paper pad to flip through, but it gets ripped up easily. I designed this to work with split rings, but the jury is still out on how well it functions with those. I may swap to just using string depending on how much binding happens when turning the cards during game play. The size of the cards are 3" (76.2mm) x 3" (76.2mm). The holes are .2" (5.08mm). Thickness of the cards are approximately .1" (2.54mm) if I remember correctly... Don't hold me to the exact thickness measurement. They are in the ballpark of that .1".

The biggest ring from this creator works well with this: https://www.thingiverse.com/thing:3979171

I had a little trouble with the ends fusing together, but using pliers I was able to separate them. After adding the cards and connecting them to the base, I use cyanoacrylate to glue the ends back together.