BACK TO THE FUTURE DELOREAN MOVIE CAR.
WE HAD TO DO A LOT OF ELECTRICAL REPAIR ON THIS CAR INCLUDING REPLACEMENT OF A WEAK FLUX CAPACITOR. IT WAS  SO WEAK THAT WE HAD TO REPAIR IT.  THEN, WE WERE ABLE TO GO BACK TO THE FUTURE 10 YEARS AT A TIME UNTIL WE  COULD BUY A NEW CAPACITOR. WE THEN REPAIRED THE  CAR  WELL ENOUGH TO MAKE IT BACK TO OUR STARTING TIME BEFORE LUNCH. NEEDLESS TO SAY, WE CHARGED THE CUSTOMER FOR PARTS ONLY AS WE DID NOT ACTUALLY SPEND ANY TIME DOING THE REPAIRS.   :-)