Originally posted by 2fletch: If the quiver is mounted properly on the bow just above the fadeouts then it shouldn't have any effect on limb efficiency or arrow spine. The change is in how it affects the bow regarding torquing. The heavier the quiver, and the position of the quiver can amplify torgue in a negative way. Just as an inline stabilizer can minimize torque, an out of alinement quiver can maximize torque.