Ahhh, I just understood your question regarding those "ring things". Actually, yes, I am using one on my left hand/finger to hold two of the colors while I hold the 3rd color in my right hand. I have taught myself to use both the English (throw) and German (pick) with fair isle. The finger thing helps keep the two colors separated. It's very weird though and I am using it for the first time so I have more learning to do
I actually have 3 different kinds and found I only like 1 of the 3 and am trying to get used to using it. Certainly a challenge !!