I recently bought some replacement valve cores for my bicycle tires. I notice that part of the core was bent so decided to replace it. It is a quick job to change the core over and, prior to throwing the old core away, I figure I would play with the macro lens. I first too a picture of the still assembled core trying to angle it to show how badly bent the part was. Then I figured I could take the core apart altogether. Another focus stack and I could show the parts separated. I love the detail you get of the metal surfaces when you shoot macro.