This week, Hackaday’s Elliot Williams and Kristina Panos met up over the international tubes to bring you the latest news, mystery sound results show, and of course, a big bunch of hacks from the previous seven days or so. Regarding Hackaday Europe, we announced the last round of speakers and opened up the workshop ticket sales . In other news, the Green-Powered Challenge has wrapped, and judging will begin quite soon. On What’s That Sound, we can score another one for Kristina, which brings her record to approximately four wins and sixty-eight losses. She knew without a doubt that this was a guillotine paper cutter, probably because she recorded the sound herself. Hey, don’t take this away from her. After that, it’s on to the hacks, beginning with a really cool laser-powered mist-and-mirrors multi-view display, a robotic drawing assistant of questionable utility, and a new slicer that enables horizontal overhangs without supports.…