I have a 2000 XC 600 and I'm thinking of streching it out to 136 or maybe more. I want to run a 1.5 inch track and I also want to roll the chaincase. My tunnel is shot anyway so this would be a good time to do it. Any tips out there for me?? I'm not to sure about SLP's rail extenders, I've busted stock rails before by jumping. How do they hold up? Anybody out there ever rolled a case?