So I went to swap my rear brake pads last week, and I found something that seems a bit odd: I don't have a circlip on the pin to keep it in place, yet I still cannot tap it out. I tried gently tapping it from each side (figuring that it might be stuck due to grit, grime, or other GS-riding-related issues), and it has some freedom to move, but not much. So... a) has anyone ever seen this before? b) any thoughts on attempting to repair it? I'm leaning towards sourcing a used, lower-mileage caliper in good condition, as I'm inclined to assume that the main sliding pins are also in rough shape and don't appear to be available as repair parts. (pin is upper-left in photo; from other angles, the indent for the circlip is visible, but there's no circlip in it).