Last year Elon Musk, Founder and CEO of Tesla Motors, released a 50 plus page white paper about a ‘Hyperloop’—essentially a high-speed train that travels around 800 miles per hour. Along with the release was a note saying he didn’t have the time to take on such a project, but anyone who wanted to could. Well some one has—a group actually—of people who work day jobs at companies like Boeing, NASA, and SpaceX, and donate their nights and weekends to this endeavor. And, they’re actually making headway. So far they’ve improved Musk’s train car design, are working on a more usable route than Musk’s proposed Los Angeles/ San Francisco line, and have calculated the cost production (kind of) to be somewhere between $6 and $10 billion. The team says they are about a decade away from an actionable plan.