I recently had the Tesla roof rack installed at a local service center. From a distance it appears as if the rear crossbar is slightly taller than the front crossbar. It will be a couple of months before I have an opportunity to mount a Yakima FatCat and a couple snowboards to view it in action . Can anyone who has put their rack to use comment on my suspicion that the crossbars are not level? I included a couple of photos - the driveway photo is deceiving because the car is parked at an angle.