That bloody great section of modular alloy strut could be a source of new and interesting wind noises at speed.
You can get plastic sections that snap into those adjustment track slots to give it a flush surface, that would go a long way to help reduce any buffeting wind noise, but you wont be able to do much about how the square section cuts bludgeons it's way through the air.
I'm not saying don't try it, but don't be surprised if the results have the side effects I mention.

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