Bumping in hopes there might be a progress report! @LilAlex
Hahahaha! There is -- and just today! Our jeweler talked us out of the closed huggie-hoop design because the catch always gives out and they get lost. (We have known him for decades and I trust him on this.) So we are starting with solid Pt 10mm "almost-hoops" with a small post back. DD was in town today and had a chance to check them out.
With this design, I wanted a double jump-ring design with the drops permanently attached to the "bottom" of the hoops but DD (and the jeweler) prefers ones with a generous loop that can slide front-to-back on the hoop like a charm. It is "captive" because there is a sort of nailhead on the free end of the 3/4 hoop so a slider with close tolerance can not slip off once it's on the ear. Kinda like the @Cerulean drawings above.
I know a picture would be better -- hope to have one soon.
Once that is done, I will get to work on your lovely design for the (much higher-stakes) two-stone dangles -- Asschers above colored stones for my spouse.
I hope the thesis went (is going?) OK...!