Have made at least 2 more sourdough loaves in the meanwhile.
Loaf #3: made with whole wheat flour, per recipe. Was not as flavorful, although folding helped with the bubble texture and volume. Crust didn't brown much, and dough was very wet to handle.
Loaf #4: switched back to the rye again. This one got retarded a few times in the fridge, and dough was extremely wet to handle. I think it sat too long; didn't rise too well, and baked up pretty flat. Decent texture, but too wet to handle and bake, and again, crust didn't brown.
I've had issues with the crust browning. Probably need to bake it longer.
Loaf #5. This time (started at 5pm, doing last 2 hr rise pre-oven right now), followed the King Arthur Flour (KAF) Pain Au Levain recipe volumes (not weights) to see if it made a difference. Funny thing is, dough was still extremely wet.
Here's the initial volumes I used. I weighed the volumes on my scale, to give a more accurate measurement of what went in:
5 cups all-purpose flour (weighed 1lb 10.75oz / 760g)
2.5 cups starter (weighed 1lb 0.5oz / 468g)
2/3 cup rye flour (weighed 3.25oz / 94g)
1-3/4 cup water (weighed 14.25oz, as expected for water)
So the weights given in KAF for starter, rye and water are right, but the AP flour was way off. Even with that, though, the dough was way too sticky, unkneadable without additional flour. I added 3/4 cup additional flour for it to just pull into a ball. It was still sticky, but able to be handled/kneaded in the mixer. Was almost too much flour for the mixer, though.
Here's tonight's recipe
5.75 cups all-purpose flour
2.5 cups starter
2/3 cup rye flour
1.75 cup warm water (~90 degrees)
2.5 tsp table salt
Mix flours, starter and water in a mixing bowl, stir until just combined. Let rest for 20 minutes. Knead on 1 notch above lowest setting for 10 minutes. Cover with plastic wrap and towel, and let rest for 1 hour in warm place, in my case, garage on high shelf.
Dust flour in bowl. Using scraper and spatula, turn out onto dusted board. Dust with a bit more flour, then do letter-fold. Put seam-side down into oiled bowl, cover, and let rise again for 30 minutes. Dust, remove from bowl, letter fold, then return to bowl to rise another 30 minutes.
Dust peel with cornmeal. Remove dough from bowl onto dusted board, and shape into boule. Cover and let rise for 2 hours in warm place. 30 minutes before baking preheat oven and broiler pan to 475F. Shelf is 2nd from bottom with pizza stone, broiler pan on top shelf.
Heat 3/4 cup water in Pyrex (microwave for 1 minute). Slash loaf with serrated knife or razor blade (I think scallop slash looks and works best).
Working quickly, slide dough into oven, pour water into broiler pan (watch out for steam!), reduce heat to 455 and bake for 20 minutes (don't open the oven door!). Turn down temp to 450 and bake another 10-11 minutes. Crust will be beautifully brown. Check for doneness with oven thermometer thru bottom of loaf.
Let cool on rack for 15 minutes. I'll let you know how it turns out!