I make Walter Sands' Basic White Bread and Grandma's French Bread exclusively in the CSO (mainly because my oven has become more of a storage place for my cast iron and I don't like moving everything out) and I proof both in the CSO. The white bread I proof at 100F for about 25 mins and the French bread at 100F for about 15 mins. I've never had a flat loaf.
Edited to add that I don't think I've ever used bread flour--I always use all purpose.