Problem #1: Instructions mention 2 1/2" bolts, the bolts supplied in my shipment weren't even 2", so couldn't screw it in.  Had to go out and buy new bolts.
Problem #2: On one side, the entry points for the bolts were clearly done poorly, was a huge pain to get the bolts in.  Looking at other reviews of this product, it seems as though there are some quality control issues with 5-10% of them.  Perhaps I was just unlucky.