Well I had no luck in getting a used rack system, so I'm going new. What size bars are people using for a Yakima Q-tower set-up? The Yakima site says 58" but that seems like it would hang dangerously over the edge. I only want to carry one kayak. Anyone use the 48" bars? Also, how are people doing bow and stern tie-downs? My Rav 4 had nice hooks underneath. Monica