I realize this may not be very relevant, yet. But I noticed the other day that my X has the full mesh grill on the dash below the windshield that the defroster blows through. When I put the defroster on to try it there didn't seem to be a large amount of air flow. I wonder how it will be in the cold of the winter especially with the massive windshield? FYI 2012 and early 2013 Model S had the same grill. Tesla retrofitted tradional defroster outlets to alleviate the problem for us. The mesh grill certainly looked better but for us in Canada we noticed a huge improvement once the change was made.