Question for the group. I have a 2015 F150 with the 6.5' bed. It currently has a roll up tonneau cover. I am looking for a rack system that mounts in the bed rail pockets like the Thule Tracrac so it is adjustable fore/aft. I am also looking for a rack that is height adjustable like the Yakima Overhaul HD. Has anyone found a rack that adjusts fore/aft and is height adjustable that works with their tonneau cover? Please let me know. Thanks in advance!