Hey Mike, I can definitely help with this. You are correct that to make your TracRac tonneau cover compatible, all you would need to do is add the base rails and swap out the feet (modular sliders as Thule calls them). That said, the cost of these individual components can add up, and buying a whole new system does seem like the logical thing to do.
You would need two of part # TA01-42004, two of part # TA01-42003, the base rail set # TH21781 and four of the knobs # TAKB-90030-1. With... view full answer...