I cut a piece of Reflectix to fit inside and velcroed it in and that helped a lot.
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Velocity Blue 2020 F-250 XLT Crew Cab with Short Bed (bought 12/30/2020)
2021 Jay Flight 28BHS (bought 11/14/2020)
E4-10k Equalizer Hitch
Furrion Vision S 7” Rear and Side View Cameras