When I was growing up, I worked for a company that installed pools in people’s backyards. When it came time to actually remove the dirt, we called in the best of the best, let’s call him Ernie. Ernie would show up with his backhoe and asked to see a design for the pool. After studying the shape and depth, he went to work. He could move the backhoe around to master the perfect shape and depth of each part of the pool, without getting out and measuring his angles or how much de