I purchase 1 extra crossbar to ensure I could place a 3rd solar panel or rooftop deck. At the Orion price you can’t beet it even if you don’t have an initial use, get at least 1. I wish not I had purchased at least 1 more just to have a spare. Totally happy with purchase of roof rack, Ladder and extra rail. Everything fits like its custom made for my van. Will definitely turn to Orion to buy my awning when I’m ready for that purchase.