I helped a missionary figure out a recipe and instructions for making sourdough bread in a bread machine about 25 years ago. She wanted to use the bread machine in Papua new GuineaYou are welcome. Hope it works for you. It is the result of lots of trial and error. I have been sticking with this one for several years now. Very few ingredients, and by machine.
But I still miss the feel of the living dough on the punch down ...