i think it was john mcadams that asked; i pushed the wrong button and it went away so here goes appended to another e/m i have i can find to the same bunch. john; does the caliper slide b4 or after the puck begins to move and at what speed will the inertia of the caliper overcome the pucks resistance? or will your puck stay in position and your caliper always vibrate back and forth to take up end play, will this wear out the sliding mechanism? do you begin to see the problem?? JEFF tucson az.