Tesla will finally unveil its new Roadster on October 1, more than eight years after it first showed the car in 2017. And a teaser this weekend suggests the production version is getting Tesla’s “Cyber” design treatment.The teaser shows SpaceX cold gas thrusters firing out the back, and Elon Musk has promised “radical design changes.” But the Roadster never needed a redesign. It needed to ship. more…