Ole Toad has a leak at the rear brake master cylinder. Nearly emptied the reservoir. With help from my good friend, we removed the mc, honed out the cylinder lightly, and preparing to assemble and reinstall. Question to anyone with mc experience - the reservoir hose, ending at the mc body. Is that a press fit? How to remove and reinstall? Does an O-ring live in there? A circlip live in there? Should/can the fitting be easily replaced? TIA.