Maybe you should have upgraded from the crappy Sora to Ultegra or DA. If you replace your cables before they wear out and brake you won't have that problem. If you leave on a brevet, especially a long one with worn out equipment and it fails that is poor maintainance not an equipment failure. It's the same thing as leaving with a thread bare tire, worn chain or brake pads. I know many people who've been riding for years without a cable failure because they replace them before they brake. The same goes for DT shifters. You shouldn't leave a cable on that long. If a handlebar breaks, or a spoke breaks I consider those things equipment failures. They are not things that wear out on a regular basis or are subject to regular replacement. That was my point.