Johns aging Land Rover Discovery needed a prop shaft replaced. He found the usual dealer network prices to be criminal. He then (under recommendation) found Jack from Landy Mega Centre. Their prices were very reasonable and they insisted on fitting the prop shaft themselves. Upon fixing the shaft, Jack from Landy Mega took the car for a test drive and replaced the shaft for a second time (Jack was not happy with the first shaft that had been fitted!). Jack then insisted that the car was still not running to his satisfaction and proceeded to plug it into his diagnostic equipment. John imagined a vast bill while Jacks team checked all sorts of sensors and filters. John drove out four hours later in a car that had been completely rejuvenated and the cost? Nothing apart from the prop shaft!