I have been contemplating rebuilding the brakes on my trailer. It is a tandem axle haul-rite with dual disk brakes. It started making a clunking sound and gives a little jerk when starting from a dead stop almost as if the actuator is sticking. My question is has anyone done this before, where did you start your process of elimination, and was it easier or harder than you expected? Any help would be greatly appreciated. Oh, by the way, It is a Titan model T4750520 actuator.