I have a B17N on my audax bike. To be honest I have forgotten the full details about breaking it in, but the mere fact that I have forgotten it must mean it can't be as bad as some of the stories make out!
Apparetly the B17N are supposed to be difficult to break in too. It was very hard when I first got it, but not uncomfortable. Did need a bit of setting up though as the right height and angle are critical. I would say that one longish ride of a few hours is probbaly enough to get the breaking in process well under way.