remixity

I'm trying to install the rear brake cable on my RS2, but it seems that the cable grinds against the inside wall of the standoffs on the underside of the top tube. I tried using some metal cable ends that I received from probikekit for my Ultegra groupset, but the cable is still misaligned. Is there a part specifically for the RS2 frame to center the brake cable as it passes through the standoffs?

Also I tried to get to the PedalForce website but it seems to be down at the moment.