Tesla has ramped up work on its long-delayed Roadster. Here's what insiders have seen.
1. Tesla resumes design work on the Roadster after over a year pause. 2. Production expected in two to three years; design is still evolving. 3. Elon Musk hints at a major update and possible demo by year-end. 4. Several reservation holders have canceled, seeking refunds for deposits. 5. A new aerodynamic patent could enhance vehicle performance.