Proof of Concept and Beta completed. Actual unit survived the "garage door" compression test module, and once inflicted on the unsuspecting public, resulted in zero noted: horn honking, panic waving to pull over, lights flashing, or odd dragging sounds. I did talk with a guy outside Starbucks for a while about bricks, he used to have an early K100, so the rack does get some attention.
Now to figure out how to carry the kayak to the boat launch.