That’s a solid thread of ideas — lots of creative takes on storage racks, sliding shelves, and drawer boxes. I like the pivoting rack with an air strut for quick access, and the plywood drawer build sounds like it’ll be super practical if it’s bolted and sealed well. Safety with securing that spare can’t be overstated — nobody wants a 100+ lb tire flying around in a rollover. Seems like you’ve got a good direction whether you go steel rack, wood drawer, or a hybrid.