Hello!
I saw this thread and thought I’d chime in. I found this recipe some years ago and have since used it as a framework for various kinds of sourdough loaves.
I’ve made some modifications along the years for ease of use for me. I thought it might be a useful starting point for you all.
http://www.bakingmagique.com/2014/09/gluten-free-sourdough-bread/ 
Just made a teff based sourdough the other day! Enjoy!
