I purchase a set of Hellwig Helper springs (1000 lb) for my 2016 quad cab short bed diesel. They do not fit this truck as claimed. I spoke with Hellwig directly and they first said yes they should fit. After sending pictures of the issues they agreed they do not. The factory spring clips are in the way of the mounting point. Said they needed to send pics their engineers to find out what was going on but never got a resolution. They sent me a return shipping label and are refunding my money. Between my truck cap and roll out bed and equipment in the back i am carrying around 800 lbs. The issue i have is the rear suspension keeps hitting the bump stops on bumpy roads. Thought the helper springs would solve my problem. Cant seem to find any other options. Has anyone beefed up their rear springs? Was also going to install the Hellwig sway bar but based the thread i just read it sounds like that unit has fitment issues also.Regards Bill