Yeast water for 100% semolina bread

First time trying 100% semolina bread using yeast water for leavening. I used a basic recipe with semolina, yeast water levain, salt and water. Because semolina is a bit coarse and hard, I decided to autolyse it for 12 hrs with added salt. This was the same time it took for the levain to mature. At the end of the autolyse the semolina was soft and held to its structure.
Levain (12 hours to mature)
40 g semolina
40 g yeast water (grapes)
Autolyse
282 g semolina
187 g water
5 g salt