Originally Posted By CetmeMI:
If the quad rails are centered, you may want to try using the locking screws and if that doesn't fix it, contact the seller on Ebay before you start sanding it down.
I thought about using the screws to center them last night...I'll try when I get home today. In my bottom left pic, you can also see that the width of the rail doesn't match the the upper. It's a little short.
don't get me wrong, for the amount paid I still think its a good deal.