I am all set to receive my Model S early 2013 (p5664, 60 kwh, blue, blk leather, pano) and have my garage all ready to go. Fortunately the outlet is a mere 5 ft from where the rear driver's side will be. I'm wondering if I can make a short cord for daily charging and simply leave the 20ft cord in the car for on the road charging. Does anyone know ( possibly someone lucky enough to already hane their S) if the charging cord has any additional circuitry necessary to monitor charging? Can I make my own 5 ft charging adapter?