Ours whistled (very annoyingly) and rattled when we first bought it. We put on extra weather stripping at the top, and that definitely made a huge difference. When the wind is blowing hard (I mean 25+) and we're at just the perfect direction and speed, it still makes noise. Guarantee you'll never have a silent ride. We never considered bending the door!
2017 Melbourne 24k towing 2003 Jeep Wrangler
2013 Premier 19FBPR; 2013 Rpod 177 HRE
2011 Aliner Sport; 2008 Little Guy 5-Wide
1980 Shasta 21; 1981 Coleman Tent Trailer
1978 VW Westfalia; lots of tents