I was looking over R. Aryeh Kaplan's Chumash and I think he lists ... six different possible layouts of which tribe's name went on which stone in the breastplate (choshen).
Similarly -- is the mor in the incense an herb called myrrh in English, or is it an animal product? Different commentaries have different approaches.
So what does the Temple Institute (Machon HaMikdash) do when they plan on re-creating garments? What's their overall process of deciding like whom to pasken?
(I guess a broader question would be -- when Mashiach comes, will we be told from on high how to do it, or will the rabbis of the time just have to make their own judgment call?)