I used to be a stone mason. I’d mix concrete in wheelbarrows, lug rocks around and shape fridge-sized sandstone blocks with a mallet and a chisel. I loved it. I was out in the sun with some great blokes and ham sandwiches never tasted better. But working in a limited market meant jobs started to slow to a trickle. Because we were ‘purists’ (read: luddites) who did everything by hand, our work could take months to complete – and that made it expensive.