I've ran the aero bars for a few months no issues. Bought a canoe this weekend and found the gunwales are too wide for the aero bars. I stumbled upon a Reese universal kit at Wal-Mart (I know...) with 48" round bars and clamps for $89. I had to trim a little bit of rubber in the clamps to fit perfectly on the raised rails and they are claim to only be rated to 110 lbs. Those are the only two issues. I don't have plans to carry anything heavier than that so I'm fine with it. I've since added my Inno fairing back to reduce howl. I'm also thinking if I ever wanted to go wider I can swap a Yakima bar and use the same jaws. The rating is for the bars not the jaws I believe.. not certain on that.
For reference that is a Coleman Ram-X 16' with 38" beam. Weight 70 lbs.
Just an option for someone looking at the cheapest way to get into a functional rack system on the XV.