[Christ]

HDD magnets are fun. You can make really old HDD magnets attract through a 1/2" thick oak table, which freaks people out, when something w/ a magnet hidden in it starts moving around on the table and no one is visibly manipulating it.

PC7 epoxy should be plenty strong enough to bond some magnets to either the rims, or to the pizza pans, and obviously, magnetism will do the rest. I'd say 3 decent HDD magnets, postitioned 72* apart, around the circumference of the wheel, would be more than sufficient to deal with everything except a pot-hole or a thief.