OK so last month we talked about co2 usage and we compiled a nice little user's guide. This month, its chain repair and I need the down-low. Let's cover chain repair tools, pins, particular chains with replaceable links, etc. Please give me some guidance. I just got a new Shimano Ultegra chain put on on Sunday. Today it snapped off and I left it in an intersection on a downhill. I want my next chain to be fully repairable and I want to learn how to do this myself so I'm not SOL next time. Thank you all for your input.