I have a 2012 Superfly hardtail with Sram XO crankset running 39/26 chainrings. Has anyone used the K edge Dirt 3 chain catcher on the Superfly? I have dropped the chain a couple of times on mostly rough descents and am looking for some additional security. I replaced the front derailleur with a XO designed for a double chainring. I sent K-Edge an e-mail but they may be partying it up in London. If you have an alternative please let me know. Thanks.