Go with the Yakima kit. CX7 bars do not work.
The Yakima kit (landing pad 11, control tower, ...) works great, which is what I'm using now.
The Genuine Mazda Accessories 0000-8L-M01B Roof Rack for CX7 does NOT work. See pics of my failed attempt below.
Here's what I did:
First pry the trim...