I got my Small ML frame and built it up about a month ago and have a problem with the XT rear der. hitting the Horst link area of the frame. I am saving up for an X9 rear der and shifters b/c I am sure the SRAM rear der's don't hit. I am using a homemade rubber bumper now and it's WEAK. Has anyone else had problems with this? Does Titus know this and now spec SRAM instead on their build kits? Thanks!