So, yeah. I'm pretty green when it comes to most modern things. Keep that in mind. The calipers on my new-to-me RD where frozen. After a nice long afternoon I got both pistons moving, and was able to pump them out as far as I could before they bumped each other. But at this point, even after splitting the caliper in half, I still can't pull the pistons out completely. I've read a lot about using air pressure, or pumping grease in there but the caliper needs to be bolted together for either of these methods to work. Is there a puller or something to use at this point? I mean, what's a boy to do? Related: My rear MC doesn't pump fluid. I feel air pressure pulses if I cover the end of the banjo with my fingers, but couldn't get any fluid out the business end. Is there anything else I should check before I pick up a rebuild kit?