I have an STX, and installed the hitch from eTrailer and the Ford brake controller with the center mount light harness. Ran the blue wire back to the plug and spliced. Works great towing the scout trailer, which is about 5k lbs. Used the Light Force integrated switch panel to mount the controller.
Got the headrests in from a 2019. They slide into the posts perfect, and match the interior without any issues. There is once key difference that will require some grinding as the latch indent on the folding headrests is smaller than the stationary ones, so to get them to lock into place will...
Little tip, I did the front badge without removing the grill. Reached up behind the grill through the hole in the bumper in front. The nuts were finger tight and I pre-threaded the new badge before installing.