F150 drove ideally as I wanted it to when I bought it new. After driving 17,000 miles, which includes about 1,200 tows, normal daily driving, and the occasional full load, I've noticed the truck getting sloppy/floating, especially on rough pavement. Based on my previous experience with Bilsteins, I was a bit nervous. On the originally stiff 1st gen TRD Tundra they were still quite stiff and seemed to make the rear end even stiffer in some ways. I liked that the new F150 was manageable at first…