I just went to put on my Saris truck bike rack on my disco sport for the first time (originally had it for another car) and realized that I'd have to put the "upper" latches over the spoiler which I'm sure is too much pressure on it?? And I don't know if using the upper latches more on the corner or side is enough support? Does anyone know if it's possible to use this sort of rack on the car or do I need to get a different style? Thanks!