I found a Thule rack on craigslist that was on a Audi Q7, it has the 460 feet and the 50" bars. I know that I would need to purchase the kit to fit the CX9, but I recall (but can't find the thread) that 58" bars are recommended. Thule's fit guide has 58" bars as well. Anyone know if the 50 will work or will they be too short?