Tesla has unveiled its latest product – and it’s not a car, Optus still under fire after its catastrophic data breach, the timely Norton product released months before the Optus debacle, we take a look at the new Sonos Sub Mini, Amazon releases a new read and write Kindle and new Echo speakers, Bowers & Wilkins launch new audiophile quality headphones and we’ll answer all your questions in the Tech Guide Help Desk.