Crunching the #'s on audio system wiring and have a few questions from those that have done it before: Power wire from battery to amps behind rear seat (driver side) questions: 1. Approx how many feet is this wire run (through passenger side firewall, down passenger side, behind rear seats to driver side)? 2. What is max wire gauge you can use through this route? 2awg or 1/0? Will also need to fit GJ wire harness. Speaker wire questions: 1. On the B&O system, are there dedicated tweeter wire runs? 2. And if so, what wire gauge? Will be feeding them ~80W RMS, so want to know if I should pull wire for those as well. Thanks in advance!