So, I'm not a huge fan of my Pullrite Superglide....

I had one until I purchased a long bed. I love the Pullright, even though it was the style that required spraying rails with slip plate. I adjusted that nut one time, and never had any more banging. I either called Pullright or dealer and they told me how to adjust the nut. Call Pullright. They have excellent customer service, and will walk you through the adjustment. If its adjusted right it will not require a bungee cord to hold it in place when not pulling.