The smallest official LEGO Technic sets in recent years have a been a bit, er… rubbish. But all that could change with Rabbitdesign’s tiny tracked tipper. Based on one of the Caterpillar Company’s more unusual vehicles, Rabbitdesign’s Technic version features working tracks and a tipping load bed via a worm gear. You can see more on MOCpages, and you can vote to turn this model into an official LEGO set via the newly re-launched LEGO Ideas website (formally LEGO Cuusoo).