I bought the insulated flexible duct for the bathroom fan and installed it.
I tried this, which seems kind of sketchy, based on what the roofer said that he's seen people do. I am a little worried about too much water sitting in there. I haven't found very many links on the web encouraging this though. Should I just straighten it out instead, or would the amount of water that would normally accumulate just evaporate off? I could leave it like this for a year and monitor it. I am probably worrying about these things more than I should.