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.