While I've built bikes before, this is my first attempt at one with disc brakes, and frankly, I'm lost. The fork is a Manitou Skarab and I'm pretty sure I can mount one there fairly easily. The frame I purchased, a GT agressor 1.0 hardtail, does not appear to have a bracket to mount a set of disc brakes. I would really appreciate if someone could tell me how to mount a rear disc brake to my frame.