While I did some misc. stuff today, my main focus was making a number of the stacking rings (just the basics), and keeping track of the time they took.
I was pleasantly surprised: I made 6 today, and they only took a but under half the time I'd guessed for the very basic versions. Obviously, adding more stuff takes longer! but I should be able to offer them at a pretty competitive price, at least for direct sale; many of the other versions seem to use lighter silver stock than I am, so that does make their cheaper to make.
I'm definitely pleased by this, because I've been wanting to find some things that I can make without a ton of time needed, and so be able to offer them affordably.