Agreed. I'm having trouble visualizing the layout of buttons 1, 2, and 3. I wonder if the author actually understands it well enough to explain, vs simply repea

Agreed. I'm having trouble visualizing the layout of buttons 1, 2, and 3. I wonder if the author actually understands it well enough to explain, vs simply repeating what he was told. And is the spring part of the band? That's how I read this: > showing the band and its internal spring and tooth system mounted within the band slot.