I didn't use the Bajarack mounting clamps as those are obviously meant to be used with their tubular racks. I had the same can carrier on my 4th gen with a Bajarack and I was happy with it. I figured I could just substitute their hardware for the standard t-nut and bolt set up used to mount other stuff on the 80/20 extrusion. I moved some rails around to make sure it was supported at both ends and in the middle, and it worked like a charm. I've already put a few hundred miles offroad with full fuel cans on it, including some vicious washboard, and it's been flawless. No issues carrying the weight or rattling etc.
Hope these help...