While I wait for my Model 3 I wanted to get my garage wired up for EV charging. My question is focused on whether or not its worth it to pre-wire for 80 amps? My initial plan is to charge my M3 during the night at 40a via a NEMA 14-50 outlet; however as I learn more about how I use my Telsa and its charging needs I want to be able to upgrade to the HPWC @80a without having to re-run the wires (would only have to upgrade the circuit and install the HPWC). Anyone have thoughts on this? I understand that 2 AWG for 80a is much more expensive than 6 AWG for 40a; but again, is there any negative implications to setting up a 80a charging infrastructure and only actually using 40a? Also, I know I need to conduct a proper assessment of my electrical panel and total amp capacity. I'm keeping these considerations separate as I would definitely get that research done pending feedback on the above question. Thanks!