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The pre-production beta is on the way to me from Hong Kong for testing on my car.
Here's a video of the rear T being tested on the work bench by the Oznium team in Hong Kong. A dual brightness driver will be integrated into the circuit.
COOL!!!! You really have created a service for Tesla owners. I can't wait until this comes out. I hope the install will be as clear as the one for the front T (and then maybe I'll do them both at the same time -- building up my guys for it).
Another idea for you -- a trackball or trackpad to control the screen...