Hi All, I just put a deposit on a used 2016 Model X 90D. I was super excited about my purchase until I started reading some of the posts on this forum about the earlier design flaws such as the noisy cabin while driving at faster speeds, not having a rear door sensor (door closing on your head) and the ride feeling a lot more harsh than newer models (older suspension). Was told by my used Tesla advisor that my car was built in October 2016. Can some of the experts please chime in and let me know if any of these issues were fixed by October. I recall reading about the late 2016's being more desirable. My sales advisor wasn't sure. Thanks in advance!!