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AutoblogGreen had the rare opportunity on Friday to chat with Toyota CEO and president Akio Toyoda where he revealed a prototype vehicle with a Tesla electric drive unit was under construction. Tesla CTO JB Straubel has now told CNN Money that the Silicon valley company is preparing two mule vehicles for Toyota. Tesla battery packs, power electronnics and motors are being installed into Toyota bodies.

As we continue the tale of Elon and Martin, we pick up from the initial involvement of Elon Musk in Tesla Motors. Musk has put in the single largest chunk of money that has allowed Tesla to develop and now start building an electric car. Here we delve into the subject of his role in design decisions. As some in the mainstream media have taken to referring to Musk as the "creator" of the Tesla Roadster, this is a particularly contentious subject.

JB Straubel, Chief Technical Officer at Tesla Motors has just put up a new post at the Tesla Blog with an extensive update on the Roadster drivetrain updates that are coming later this year. As we reported at Tesla's recent schedule update, the Silicon Valley start up is currently planning a running change to the upgraded powertrain beginning with car #41 which should happen sometime in late summer. There aren't any huge surprises in Straubel's post, but there are some interesting details. When

The chief technical officer at Tesla Motors tells AutoblogGreen that 10 to 15 more test prototypes will be built next month as the company prepares to start manufacturing the much talked-about electric roadster in mid-2007. "We'll be finalizing the last changes we want to make from the first batch to the second," says JB Straubel, who was promoting the Tesla Roadster at the LA Auto Show. The first 10 prototypes are currently undergoing a variety of durability and validation tests around the worl