Dublin-born inventor and engineer David McMurtry seems to be at home amidst the hum and whirr of 3D printers at the headquarters of his company, Renishaw, in Gloucestershire. He’s no stranger to such environments, having grown up in Clontarf and spent some of his childhood among the machinery at his father’s sweet factory in Fairview. He then moved to England to take up an apprenticeship at Rolls-Royce, where solving a problem on Concorde’s engines would set him on the path to creating a multi-billion-pound, FTSE 250-listed company with his co-founder, Welshman John Deer. McMurtry is standing beside one of his…