$120 isn't expensive?
I didn't undo any sort of bolt - I did them like my old SHO's calipers:
spin them clockwise (the pistons themselves). They "screw" back into the caliper.
^You are the only person (that i know of) that has done that. I 'know' doing the procedure (above/unscrew the hex adjuster) does work...
I did it like that