Here is what David had to say after building his nice pickup truck rack setup using No Weld Towers.
"Very happy with the product quality and service. There are no real bed rack solutions for Nissan trucks fitted with the Utilitrack system. I used 1.5" steel angle for the bed top rails and also for vertical supports that lock into the Utilitrack. The supports attach to the Utilitrack with Superstrut hardware (from Home Depot). Your towers attach to the bed rails and I used 12 ga Superstrut for the crossbars. Painted everything with bedliner.
The rack is rock solid and holds the tent at the perfect height (Smittybilt Overlander XL). It's a short bed truck (5' box) and I was a bit concerned about the large tent at first (it's 6' long"), but it works great."