Same problem here
Just purchased a used 2020 Hurricane 29M with 12,500 miles. Took it on our first trip of roughly 300 miles yesterday. Same exact buzzing issue that you’re describing. Right behind/under the driver dash. It started happening about half way through the trip. Starts up at about 40/45 mph and is definitely speed/wind related.
Super annoying, but I suppose if it’s not a mechanical failure and just something wiggling I’m not too worried about it. I would like to get rid of it though. If you have any luck please update us!
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