Originally Posted by Just Me
i'd have to see the actuator, but i hear they can corrode badly.
one note - the piston(s) are singular. There is but one, and it does not float. The two halves of the caliper do. Still unclear if you're missing that point, or just typing too quickly....
What I mean is they work just fine using th brake pedal, and release on their own. So its not the caliper guide bolts.