I've always liked the idea of hanging RC Helicopters on the wall. It looks cool and saves a ton of shelf space. There are a lot of DIY ways to do it but if you'd prefer a actual clamp ARK RC in Australia is selling some in assorted colors for AUD $5. They even come with screw covers for a clean looking installation. Source (ARK RC): http://arkrc.com.au/skid-clamps-1/?sort=alphaasc
