The metal-bender police and the Titan slayers share the similarity that they travel large distances using cables to swing around. But that's were the similarities end. The metal-benders keep their cords coiled on their back and have the cords launched from the wrist area. The Titan slayers have their cords and central balance around their waist, also the cords seem to be launched from that area as well.

now I'm not a complete design/physics/weapons expert to this matter yet I would side with the metal-benders design method of travel. Unless someone can explain to me how balancing from your hips can be better then from your arms.