the pictures I took with my phone aren't the best in the world, not good enough to show the inboard side of the right hand piston pin area. but, the inboard side of the right hand piston where the circlip used to be does have enough of a damage area/path to have allowed the circlip to come out of its slot. and the pin was really loose (i was able to push the pin from the outboard end inboard with virtually no pressure, it really did just slide out). what puzzles me, still, is the amount of damage on both the outboard side of the right hand piston and the outboard side of the right hand cylinder,,,,both of those locations show a lot of damage,,,but the outboard circlip on the right hand piston was securely in it slot and the pin would not migrate outboard beyond that circlip