I took off the bleeder nipples, pistons, and seals from the calipers. The large bolts that hold the halves together stayed and painted (thats how they are stock, and that's how Porsche does it). Rebuilding a 4 pot caliper is pretty simple. For the general public, I'd rate it a 5 on (1 being easy like headlight bulbs, 10 being an engine rebuild). A write up for the caliper rebuild is coming.