As I mentioned previously I decided to try "My Daily Bread" with SD starter instead of packaged yeast. So I added 1 cup of fed starter to 1 cup unbleached AP flour and 1 cup of filtered water to make a "poolish" (I used quotes because I'm not sure what to call it when using SD starter). I let it ferment at room temperature overnight, and then proceeded to use 8 ounces of filtered water and enough flour to make a slightly sticky dough (I did not record the amount of flour used so I don't know the hydration, but it definitely is less than the 70% used in many SD recipes posted on TFL). I kneaded the mixture with my Kitchen Aid for 5 minutes at "1" with the dough hook, let it rest for 15 minutes, then kneaded again for 5 minutes with the KA at "1." I let it ferment at room temperature for about 6 or 7 hours, then put it in the refrigerator overnight. Yesterday evening I split the dough ball in half and formed 2 boules, put each boule on a piece of baking parchment, and let them rise overnight at room temperature. I baked them both this morning by preheating the oven (with a stone and a metal pan of water) to 550 F, slashing the loaf with a "+" and then baking the loaf for 15 minutes at 550 F then 10 minutes at 475 F. Final bread temperature was 212 F for loaf #1 and 208 F for loaf #2.
Oven spring was OK, shape of each loaf was a little wonky ... each dough ball formed a thin dry skin on the surface and it looked like the dough was rising unevenly as a result. Crumb development was OK but not great (not a big surprise considering the hydration was low (at least lower than 70%)). I took off a thin slice and tasted it, tastes pretty good but we'll see how the flavor develops over the next day or two. I think the pics are a bit deceiving as the crumb seems slightly dense to me.
I can see how the higher hydration leads to such a spectacular crumb ... I am thinking that in addition to poor gluten development in my SD loaves, the higher hydration doughs are a bit more fragile and prone to "deflation" while being handled after the final rise. I think I can handle that, now that I've learned a bit.