I’ve had the Tesla Whispbar roof rack on my Model S for two years and used it on around 4,000 miles of trips with either two tandem kayaks or 4 bikes. I use Yakima JayLows for the kayaks and Yakima Front Loaders for the bikes. I’m pretty diligent about checking the system and take it off and on every season to make sure it’s clean and secure. Yesterday morning before hitting the road with the family for a biking trip, I pulled into a parking lot with a large hump. I went slowly, but still scraped the bottom of the car. I have coil suspension, which I love, except for the occasional scrape. Anyway, I heard two loud pops from the roof. I got out and checked and didn’t notice any of the bikes were loose and everything seemed ok. Later at 45 mph, the entire rack system with all 4 bikes slid off the back! Luckily, no one was behind me and no one got hurt. There’s some decent damage to the car and the rack and bike front loaders are toast. The rack and front-loafers were intact and the whole system came off as one giant unit. Upon inspection, two mounts on the roof of the car are stripped - that must’ve been the pooping noise I heard when the car flexed over the hump. Has anyone experienced anything similar? I’ll probably move on to a hitch system like 1up for the peace of mind. Y’all be careful out there!