If none of the brakes "catch", seems like upstream problem. MC seals. You would probably have some pedal stiffness if a cylinder was bad, I think? Crack a rear bleed screw and see if you get pressure squirting while someone depresses pedal, close screw as pedal returns. Need to rebuild MC anyway as TC says about each wheel.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
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