Installing PullRite SuperRails in F350 -- anyone done it?

I did it on my '99 F250. Had to drill one hole and slot another. Only issue I ran into was the cross rails for the bed had been squashed a little from hauling dirt in the bed. Had to pull the bed bolt and shim for clearance. I had installed airbags at the same time. I had a rubber bed mat that came in the truck when I bought it. It fit under the rails with no issues at all.