It seems like I'll get them adjusted and then after a few applications of the brake they get out again and aren't centered. Moving the pivot bolt up or down also biases the cable tension, so it's a never ending combination of adjustments. Anyways, the brakes work poorly, regardless, and I'd love to just figure a way to put front disk brakes on them. Both front rims are uneven and braking is uneven and weak, plus they squeal like stuck pigs.