The details on building your own professional harness rather than buying the Ford one are great.
Also very cool how you wired up your own relay box to get around the BCM issue.
While it may not be "factory", there's nothing redneck about this in my opinion. A redneck would have spliced wires into the parking lights, probably burned out the BCM, blamed Ford, paid for a new BCM, then ran wire from an extension cord directly from the battery to a toggle mounted over an airbag and then back around to the actual lights (without a fuse), and probably eventually had a small electrical fire one night.
Learning how a car works at this level is something more people should do.
A neighbor just the other day couldn't get his car to start (dead battery). While he had put the trans. in neutral, he couldn't understand why he was unable to push the car out of the parking spot for access to jump start it. He couldn't grasp the concept that a fully electronic transmission won't shift without power.
2012 Se Ingot Silver 5-Door w/ 201A & Se Sport Package
2001 Silverado 1500 RCLB 4x4 4.8L 5-Speed