Well, if 20 lbs is the edge of the weight range, it's not really a good idea. Now something made to hold 40 will hold 20 without problem. But you still have potential issues with weight distribution, potential issues with Unicron wanting to roll off and onto the floor.. If I were doing a custom wall-mount, I'd go so far as to rip off drywall, build foot-sized (bot mode) shelves mounted against the studs, while (mostly) hiding the shelf supports, and then re-drywall/spackle/paint the area. I'd not screw around with a 20-30 lbs $625+ item. The shelf would hold bulk of weight, and then some sort of custom mount would further secure it to the wall. He would not move, even if I beat on the wall. I think a lot of people should keep this guy on the floor, floor shelf of shelving unit, an old-school CRT TV stand, a short dresser, etc. I just don't think mounting it from a wall, the ceiling, etc -- especially in planet mode -- will end well. I know we'll see "OMG, my Unicron fell and broke" posts from bad displaying.