I have also honed brake cylinders several thousandths oversize and machined new, close-fitting pistons to fit the slightly larger bores. The rubber cups can expand to fit a considerably larger bore without leaking.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!