was not hard at all, you bend the front two tabs down and then the rear inner one you bolt down first but not all the way, then you get the front two nuts in and then you just tighten them all together, its a bit tricky but nothing major at all, the 4th nut on the rail is super thick and it goes way past the last nut, you would need to cut it and reweld which that woulndt even that much of a mission, but right now i only got 3 bolts down.