Yeah, the caliper piston compression is easy; On the front, all you do is take a C clamp or, even better, a caliper compressor, and compress the piston back into place. Simple! On the rear, just turn the adjusting socket cap in the back of the piston. Loosen it (counterclockwise), and slide the caliper free after removing the hand brake cable. Then tighten (clockwise) once you have the new rotors and/or pads, so the pad touches the rotor, then back it off one third to one half of a turn (120 - 180 degrees), and reconnect your hand brake. =) Done! Easy!