Drey, thanks for cleaning my my handsketch! DonBuggy's version is good, enough to challenge me. . The only thing left going for my version is the space it occupies when its released, and the spare is ready for loading/unloading. Kung pwede, I'll mount a motor inside it so it goes up/down like a forklift.
Still in my thinking chair for the pick-up version. Since there's no secured locks to speak of, I still want a "quick-release" for the user, but hell for the would-be thief.