Picked up the Thule 480R rapid traverse roof rack, Thule Aerobars, and the Thule Hull-A-Port kayak carrier. Had to modify the recommended placement of the back bar a little so that the sunroof would still open.
No drilling required at all. Installation was straight forward, but I did watch a couple of YouTube videos to supplement the paper instructions a couple of times. For the sun roof to open properly, I had to modify the distance between the front and back bars a little.
I remove the kayak holders when driving around, but I leave the aerobars on at all times. I haven't noticed any significant issues with gas mileage. It actually seems like the drive is quieter with these on when the sunroof is open, which is a plus.
I just purchased a fully loaded 2012 Obsidian Black CT200H too. I'm trying to decide between the Yak and Thule rack to carry kayaks. Did you consider the Yakima Whisbar before making the Thule purchase? Just wondering what the difference is - if any. I'm looking to carry two kayaks.