BCRider, I'll try to describe mine... There's a channel in the brake body to guide the cable housing with a small step at it's base. The step isn't wide enough to prevent the housing from easily extending further into the brake body and a cable end cap barely contacts the step and isn't quite thick enough to help. The rivit body I used was just barely smaller in diameter than the main channel and rests on the step. My solution is a bit Macgyveresque, but works and dirt cheap.

Brad