I was at the factory center today for a test drive. I had already read about how hot it gets in the rear hatch of the ModelS. I brought this up to Garrett, product specialist, and he said that the factory now has a fix for this and is implemented to the newer vehicles. However, he didn't have the details. I will be getting the rear jump seats, but would like to know if any members here have any information on this "fix" from Tesla?