Flour + water = success!
This time, I didn't add too much water. \o/
It was still a mild disaster, since I ended up with flour all over my kitchen (the instructions say to "generously coat a cotton towel with flour", and knowing exactly how sticky wet dough can be, I might have floured the towel a bit too generously); but I succeeded.
Best damned bread I've had in years. Yum. Definitely going to be making it again.