simon winchester is the author of, among other books, "the perfectionists: how precision engineers created the modern world." simon winchester, pleasure to have you on. >> thanks a lot. >> why did precision become so important in the industrial revolution? >> it started actually, we know the birth date, may 4th, 1776. someone wrote to me the other day and said, you do know the significance of may 4th is "star wars" day, "may the 4th be with you," this is not my joke. but may 4th, 1776, james watt, couldn't make cylinders properly. and a man created a cylinder, an enormous thing, and the piston watt had made fit inside it perfectly such that no steam leaked out.