No need for adjustment screws which is good, I am use to these being metal not plastic. The shell like storage case gives plenty of protection if not a bit bulky. Wie gesagt, der MMX-300 ist von Art, Anschlüssen, Ohmzahl und Preisklasse m. I debated about making this update. if I had another vehicle i wanted a roof rack on I would buy this brand! Really easy to assemble I paid $150 to Bose for quality and durability. We just leave them right outside our sliding glass door to the backyard and he can grab quickly. Absolutely satisfied! This is great for everyone trying to shed a few pounds.