Thanks for the link, it helped a lot. Ive run into a snag.... I am replacing my brakes at the same time, new rotors. No matter what i do i simply cant get the piston to retract far enough to let me put the caliper back on.
I tried 12" pliers, prying against it, even taking one of the pads off and pulling it. It hasnt moved at all.
the only thought i have left is to open the bleed nipple and release the excess pressure, but tbh I dont know if thats a good idea or if it will even work.