Thanks, Chris. We're going to try just replacing the pads for the moment, on the theory that the pistons got overextended into an area that may have pits near the mouth of the bores. The hope is that the thickness of the new pads will push the pistons past the pits. If they do, Galen has some time to sort out his rebuild/replacement options. If not, then we'll need a caliper. I just got it all reassembled, and so far it's not leaking. I'm going to put an elastic band around the lever and throttle drum next to see if it leaks with pressure over time.