Hi gang, Trying to rebuild a set of V8 rear calipers for my urq. I've managed to unscrew the piston, but the gizmo surrounding the helical screw looks immovable. Must be some way to remove the e-brake arm, I'm just stumped right now. Hate to turn these in as cores after the time devoted to bead blasting them clean. TIA, - Tony lots of I-5 Audis