Ok, does it then tighten only vertically -- to the top opening of the roof rack? When I removed the end cap, the aluminum doesn't look that strong. Won't sudden stops push the bolt against the "lip" and dent it?? Damn, I wish I know someone who has it locally for me to see or take photo! I can't find any picture/diagram or even install instruction on the net!
Thanks for the info guys!!
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