A local here in Maine is soon to be headed north for the Cain's Quest race in March. He and his team mate are both riding 2010 Assaults. Both stock with the addition of extra fuel tanks. They have put a couple hundred miles on and both have blown rear shocks. For those of you who don't know about Cain's Quest, its very ruff terrain for long periods of time with very minimal resources. Right now they don't know wether to change out the rear shocks completly, or to just have them re-valved for more abbuse. I am looking for anyone with some good adviceor experience on this. There is about 30k on the line and they can't afford to have these issues. Thanks in advanced for any info.