Enjoying the open air, noise reduction, and ease of use but have some questions. I've attached a picture of the box when I walked up to it, and a picture of a piece I originally thought was purposely cut out because it had a bur on it. I'd only see the cut out when driving and assumed it was the same behind me, just never looked. I'm starting to think it came broken, but wouldn't that leave a clean break and not a bur? Thoughts?