For reasons unrelated to Di2, I will be painting my frame this winter. Since it will be stripped bare, I thought this might be a good time to consider Di2. I have soooooo many questions, I'll start slow though. Is there an easy way to tell if my bike would work with Di2? It's a 2013 Specialized Roubaix. Are there drawbacks to the different batter types? I ride in any type of weather and often get soaked. I tip my bike over when I get back and let the water come out of the tubes. I thought I'd lo