I don't recommend putting two in a cup. Even with three eggs in a cup they just slide around and fall out, especially when the turner turns them far enough. I honestly don't know how people make it work with putting multiple in a cup, since for me they eventually just fall out, its frustrating and takes a while to put them in there. I recommend just doing the tissue paper idea that I think I told you about in another one of your posts, that way you can put one in each cup and they don't fall out. https://www.backyardchickens.com/g/...-egg-turners-so-quail-eggs-dont-fall-through/
You probably already know what it looks like, but above links to a pic of the eggs in the turners
It's just going to be a simple frame with wooden dowels to make rows that I can move back and forth. Not fancy by any means but it should do the trick.